Quick answer: Here is how to use paint brush cleaner: first wipe excess paint from the brush with a rag. For a liquid cleaner, dip the bristles (not the ferrule), swirl or work the cleaner through the hairs, then wipe and rinse. For a solid brush soap, wet the brush, swirl it on the cake to lather, massage near the ferrule, and rinse until the water runs clear. Reshape the brush and dry it flat. Choose a cleaner that matches your paint: water-based for acrylic and watercolor, solvent or oil-compatible for oil paint.
Brush cleaners come in several forms: soap cakes, liquid concentrates, solvent-based cleaners and restorers for brushes that already have dried paint. They all aim to do the same thing, get every trace of paint out of the hairs, especially near the ferrule where it causes the most damage. But they work differently, and using the wrong method can be ineffective or even harmful to the brush.
This guide explains how to use paint brush cleaner of each type, step by step, for acrylic, oil and watercolor, plus how to rescue hardened brushes and avoid common mistakes. For product comparisons, see our guide to brush cleaners for paint brushes.
Types of Paint Brush Cleaner
| Type | How it works | Best for |
|---|---|---|
| Solid brush soap (cake or tin) | Lathers with water; lifts pigment and conditions hair | Daily cleaning of acrylic, watercolor, gouache; final wash after oil |
| Liquid water-based cleaner | Concentrated soap or surfactant solution | Acrylic and water-based paints; some work with oils |
| Solvent (odorless mineral spirits, turpentine) | Dissolves oil paint | Removing oil paint before soap wash |
| Solvent-free oil cleaners (often plant-oil or citrus based) | Loosens oil paint without strong solvents | Oil painters avoiding solvent fumes |
| Brush restorer | Stronger formula that softens dried paint | Rescuing brushes with hardened acrylic or oil |
Always check the label. Some cleaners are labeled for a specific paint type, and some restorers should not be used on certain natural hairs or handle finishes.
Before You Use Any Cleaner: Remove Excess Paint
The most effective cleaning step costs nothing. Before any cleaner touches the brush, squeeze and wipe as much paint as possible onto a rag or paper towel, working from the ferrule toward the tip. The less paint left in the brush, the faster and gentler the cleaning, and the longer your cleaner lasts.
How to Use Solid Brush Soap
- Wipe excess paint from the brush.
- Rinse in water (for water-based paints) to remove loose paint.
- Wet the soap surface lightly.
- Swirl the brush in circles on the soap until it lathers. Paint color will appear in the lather.
- Work the lather into the hairs with your fingers, gently massaging near the ferrule.
- Rinse under lukewarm running water or in clean water.
- Repeat until the lather stays white or the soap’s original color.
- Reshape the head. Some painters leave a little soap in the hairs to hold the shape while drying, rinsing it out before next use.
- Dry the brush flat or hanging tip-down.
Wipe the soap surface clean afterward so pigment does not transfer to the next brush.
How to Use Liquid Brush Cleaner
- Wipe excess paint.
- Pour a small amount of cleaner into a jar or the cleaner’s own container, enough to cover the bristles but not the ferrule.
- Dip and swirl the brush for the time recommended on the label, often under a minute for fresh paint.
- Work the bristles against the bottom of the jar gently, or with your fingers if the product is skin-safe (check the label; wear gloves if in doubt).
- Wipe the brush on a rag.
- Rinse with water if the cleaner is water-based, or follow the label’s instructions.
- Finish with brush soap if desired, then reshape and dry.
How to Use Brush Cleaner for Oil Paint
Oil paint does not dissolve in water, so cleaning usually takes two stages: remove the oil paint, then wash out the residue.
- Wipe excess paint thoroughly with a rag.
- Swish in odorless mineral spirits or a solvent-free oil brush cleaner. Use a lidded jar with a coil or screen in the bottom so sludge settles away from the brush.
- Wipe again on a rag. Repeat until little color comes out.
- Wash with brush soap and water. This removes remaining oil and solvent, which can otherwise dry out natural hairs.
- Rinse, reshape and dry flat.
Work in a ventilated space when using solvents, keep containers closed, and dispose of solvent-soaked rags according to the product’s safety guidance and local rules, since oily rags can be a fire risk.
How to Use Brush Cleaner for Acrylic Paint
Acrylic is water-based while wet but dries into a water-resistant plastic film. Speed is everything.
- Do not let paint dry on the brush during painting. Keep brushes damp and rinse often.
- Wipe excess paint and rinse in water as soon as you finish with a brush.
- Use brush soap or a liquid acrylic cleaner, focusing on the base of the hairs.
- Rinse thoroughly until no color appears.
- Reshape and dry flat.
How to Use Brush Cleaner for Watercolor and Gouache
Watercolor and traditional gouache rewet with water, so they are the easiest to clean. Rinse well in clean water after each session. Use a mild brush soap occasionally, especially near the ferrule, to remove pigment buildup and keep points sharp. Harsh cleaners are rarely needed, and natural-hair watercolor brushes are best treated gently.
How to Use Brush Restorer on Hardened Brushes
When paint has already dried in a brush, a restorer can sometimes bring it back.
- Read the label. Restorers vary in strength and recommended soak times. Some are not suitable for certain hairs or handle finishes.
- Soak only the bristles in the restorer, keeping the ferrule and handle out where possible. Suspending the brush with a clip or brush holder helps.
- Check periodically. Soak time can range from minutes to hours depending on the product and how much paint has dried.
- Work out softened paint with your fingers (gloved) or a brush comb.
- Wash thoroughly with brush soap and water.
- Condition natural hair if the product has dried it.
- Reshape and dry.
Brushes that have been hard for a long time may not recover fully. A restored brush that will not form a good point can still serve for texture, dry-brush or varnish work.
How to Use Paint Brush Cleaner Without Common Mistakes
| Mistake | Why it is a problem | Better approach |
|---|---|---|
| Skipping the wipe-off | Wastes cleaner; leaves more paint in the heel | Wipe brushes on a rag first |
| Soaking brushes overnight | Bends hairs; loosens ferrule glue; swells handles | Limit soaking to the product’s recommended time |
| Using hot water | Can soften glue and damage hair | Lukewarm water |
| Grinding brushes against the jar | Splays and breaks hairs | Gentle swirling and finger massage |
| Leaving solvent in the brush | Dries natural hairs; residue affects next session | Follow with soap and water |
| Drying brushes upright while wet | Water runs into the ferrule | Dry flat or tip-down |
| Using a restorer for routine cleaning | Harsher than needed; can shorten brush life | Save restorers for hardened brushes |
Choosing the Right Cleaner for Your Routine
- Acrylic painters: A good brush soap for daily use, plus a restorer for emergencies.
- Oil painters: Odorless mineral spirits or a solvent-free oil cleaner, followed by brush soap.
- Watercolor and gouache painters: Clean water most of the time, with a gentle brush soap periodically.
- Mixed-media painters: A brush soap that works across media, plus a medium-specific cleaner for oils if used.
Safety Tips
- Read and follow the label on every cleaner.
- Ventilate the room when using solvents or strong restorers.
- Wear gloves if the product irritates skin or the label recommends it.
- Keep cleaners in labeled, closed containers away from children and pets.
- Do not pour solvents or heavily pigmented water down drains if local guidance advises against it; let solids settle and dispose of sludge responsibly.
Reducing How Often You Need Strong Cleaners
Good habits mean milder cleaning. Keep paint on the front two-thirds of the bristles, rinse often during painting, never let acrylic dry on a brush, and clean immediately after each session. Brushes treated this way rarely need restorers.
Setting Up a Cleaning Station
An organized station makes good cleaning habits easier to keep.
- Rags or paper towels for wiping excess paint.
- Two water containers for water-based paint: one for the first rinse, one for clean water.
- A lidded solvent jar with a coil or screen for oil painting, so sediment settles below the brush.
- Brush soap in reach of the sink.
- A brush drying rack or towel where brushes can lie flat or hang tip-down.
- Gloves if you use solvents or restorers.
How Often to Use Each Type of Cleaner
| Cleaner | Typical frequency |
|---|---|
| Water rinse | Throughout every session |
| Brush soap | End of every session |
| Solvent or oil cleaner | During and after oil painting sessions |
| Deep soap clean with massaging at the ferrule | Weekly for heavily used brushes |
| Brush restorer | Only when paint has dried in a brush |
| Conditioning (natural hair) | Occasionally, especially after solvent use |
Cleaning Different Brush Fibers
Synthetic brushes tolerate most cleaners well and do not need conditioning, but very hot water can deform the filaments. Hog bristle handles solvents and vigorous cleaning, though repeated harsh treatment can make bristles brittle; a soap wash and occasional conditioning help. Natural soft hair such as sable and squirrel is the most delicate: use mild soap, lukewarm water, short contact with solvents, and condition afterward when needed.
Signs Your Brush Is Truly Clean
- Lather stays white (or the soap’s own color) when you swirl the brush.
- Pressing the brush on a white paper towel leaves no color.
- The base of the hairs near the ferrule feels soft, not stiff or gritty.
- The brush returns to its original shape when wet.
- For oil brushes, there is no oily feel or solvent smell after the final wash.
Staining from strong pigments, such as phthalo blues and greens, may remain on synthetic filaments even when the brush is fully clean. That tint is cosmetic and does not transfer to paint.
Cleaning Brushes Used With Varnish, Gesso and Mediums
Not everything on a brush is paint. Acrylic gesso and acrylic mediums clean up like acrylic paint: rinse immediately with water and follow with brush soap before they dry. Water-based varnishes clean the same way. Solvent-based varnishes and oil mediums need the appropriate solvent named on the product label before the soap wash. Because varnish brushes need to stay perfectly clean to avoid streaks and specks, many painters keep dedicated varnish brushes that never touch paint.
When to Replace Rather Than Clean
Cleaners cannot fix every brush. If hairs are falling out, the ferrule is loose, or the tips are worn blunt, cleaning will not restore performance. Move these brushes to rough jobs such as applying gesso, glue or texture, and replace them for fine work.
FAQs
How do you use paint brush cleaner?
Wipe off excess paint, then work the cleaner through the bristles by swirling or lathering, focusing near the ferrule. Rinse, reshape and dry flat.
Can I use brush cleaner on dried acrylic paint?
A brush restorer formulated for dried paint may soften it. Results depend on how long the paint has been dry.
Do I need to rinse after using brush cleaner?
Usually yes. Follow the label, but most cleaners should be rinsed out and finished with a soap wash.
Can I use dish soap instead of brush cleaner?
Dish soap can clean fresh acrylic and watercolor occasionally, but it may be harsh on natural hair over time. Artist brush soap is gentler.
How long should brushes soak in cleaner?
Follow the label. Fresh paint often needs only seconds of swirling; restorers for dried paint may need longer soaking.
What is the best way to clean oil paint from brushes?
Wipe, swish in mineral spirits or a solvent-free oil cleaner, wipe again, then wash with brush soap and water.
Final Thoughts
Using paint brush cleaner well starts before the cleaner: wipe the brush. Then match the product to the paint, work it into the base of the hairs, rinse, reshape and dry flat. Save restorers for emergencies, and follow solvent cleaning with a soap wash.
To find the right product for your medium, explore our guide to cleaners that restore and revive paint brushes, which compares soaps, liquids and restorers for acrylic, oil and watercolor.
