How to Wash Hair Brushes: A Step-by-Step Guide for Cleaner Hair

Let's be honest. When was the last time you cleaned your hair brush? Last week? Last month? If you're like most people, it's probably been a while. You wash your hair, your face, your body, but that trusty tool you drag through your hair every single day gets neglected. It becomes a petri dish of old hair, scalp oils, dead skin cells, and layers of styling product. It's kind of gross when you think about it. how to clean hair brushes

I used to be guilty of this. I'd just pull the hair out of the bristles every few days and call it good. Then I started noticing my fine hair getting greasy faster and my scalp feeling itchy. Turns out, I was basically re-depositing yesterday's dirt and oil back onto my clean hair. Cleaning my brushes regularly was a game-changer. It's not just about hygiene; a clean brush works better, distributes your hair's natural oils more evenly, and lasts much longer.

What's Inside: Your Quick Cleaning Guide

Why Cleaning Your Hair Brush Matters More Than You Think
What You'll Need: Your Cleaning Toolkit
How to Wash a Hair Brush: The Step-by-Step Method
Special Care for Different Brush Types
Common Mistakes (And How to Avoid Them)
When to Replace vs. When to Clean
Your Hair Brush Cleaning Questions, Answered

Why Cleaning Your Hair Brush Matters More Than You Think

It's easy to dismiss this as a minor chore. But a dirty brush isn't just an eyesore; it has real consequences for your hair and health. how to wash hair brush

For Your Scalp & Hair Health: The American Academy of Dermatology notes that a clean scalp is the foundation for healthy hair. A brush caked with old product and oil can reintroduce bacteria and yeast to your scalp, potentially worsening conditions like dandruff or folliculitis. It also weighs down your hair, making it look limp and greasy faster.

For Brush Performance: Gunk buildup between the bristles makes them sticky and less flexible. A clean brush with free-moving bristles detangles more effectively, stimulates the scalp better, and distributes natural oils from root to tip without getting caught in a web of old gunk.

For Longevity: Product residue, especially from hairsprays and dry shampoos, can be acidic or contain alcohols that degrade materials over time. Regularly washing your hair brush removes these corrosive elements, protecting the bristles and the cushion or base.

Think of it this way: You wouldn't use the same dish sponge for months without washing it. Your hair brush touches your scalp—an area with its own microbiome—daily. Giving it a clean slate is basic grooming hygiene. cleaning hair brushes

What You'll Need: Your Cleaning Toolkit

You don't need fancy products. Almost everything is likely already in your bathroom or kitchen.

A bowl, sink, or basin large enough to submerge the brush head.
Mild shampoo or clarifying shampoo: Your regular hair shampoo works perfectly. For heavy buildup, a clarifying shampoo is a powerhouse.
Warm water: Not hot. Hot water can warp plastic and loosen glue.
An old toothbrush or a clean nail brush: This is your secret weapon for scrubbing between bristles and the base.
A wide-tooth comb or a fork: For the initial hair removal.
Paper towels or a clean, dry towel.
Optional but helpful: A few drops of tea tree oil (natural antibacterial), white vinegar (for mineral deposits), or baking soda (for extra scrubbing power on tough grime).

How to Wash a Hair Brush: The Step-by-Step Method

This is the core method that works for 90% of brushes. We'll cover the exceptions next. how to clean hair brushes

Step 1: Remove All Trapped Hair

This seems obvious, but do it thoroughly. Use the tail of a comb, a fork, or your fingers. Pull from the base of the bristles outward. Get every last strand. If you have a brush with a removable pad (like many paddle brushes), pop it out first—you'll find a hair nest underneath that's crucial to clean.

Step 2: Prepare Your Cleaning Bath

Fill your basin with warm water. Hot water is a common mistake—it can melt the glue holding bristles in place. Add a generous squirt of shampoo and swish to create suds. For a deep clean, add a teaspoon of baking soda or a capful of white vinegar.

Step 3: Soak and Scrub

Submerge the bristle head of your brush. Let it soak for 10-20 minutes. This loosens the hardened product and oils. After soaking, take your old toothbrush and vigorously scrub the base of the bristles, the back of the brush, and in between every row. This is where the magic happens—you'll see grayish gunk coming out. Pay special attention to the cushion on paddle brushes; press it to work the soapy water in and out. how to wash hair brush

Step 4: Rinse Thoroughly

Hold the brush under running lukewarm water, bristles down, until the water runs completely clear. No more suds. Any leftover soap will attract more dirt. Shake off the excess water.

Step 5: The Most Important Step: Dry Completely

This is the step most people rush, and it's a big reason brushes develop a funky smell. Lay the brush on a clean towel, bristles down, in a well-ventilated area away from direct heat or sunlight. Let it air dry for at least 24 hours, preferably 48. Never use a hairdryer or put it in a closed cabinet damp. Moisture trapped against the base is a breeding ground for mold.

Expert Tip I Learned the Hard Way: After rinsing, I used to tap my brush bristle-side up on a towel to "dry" it. All that did was push water back into the base where the bristles are anchored. Now, I always dry them bristles-down or on their side. It makes a huge difference in how long they last.

Special Care for Different Brush Types

Not all brushes are created equal. Here’s how to adjust the basic method for common brush types. cleaning hair brushes

Brush Type	Key Feature	Cleaning Focus & Adjustment
Natural Bristle (Boar) Brushes	Porous bristles that absorb oils.	Be extra gentle. Use cooler water and a very mild shampoo. Avoid long soaks (5-10 mins max). Never use vinegar or harsh chemicals. Dry flat, away from heat, to prevent bristles from curling.
Plastic/Nylon Paddle & Round Brushes	Often have a rubber cushion base.	These are the most forgiving. Follow the standard method. Ensure you scrub the seam where the cushion meets the plastic base—grime loves to hide there.
Vented & Hot Air Brushes	Have openings or barrels.	Use the toothbrush to scrub inside the vents or barrel openings. Rinse with the water stream directed through the openings to flush out debris. Drying is critical—ensure no water is trapped inside.
Wet Brushes & Tangle Teezers	Flexible plastic bristles.	The standard method works well. Their design often traps less hair at the base, making initial cleanup easier.
Brushes with Wooden Handles	Varnished or unfinished wood.	Avoid submerging the wooden handle. Only soak the bristle head. Wipe the handle with a damp cloth and dry immediately to prevent water damage or warping.

A note on brushes with metal parts (like some round brushes): Dry them immediately and thoroughly after rinsing to prevent rust. A quick wipe with a dry towel on the metal parts helps.

Common Mistakes (And How to Avoid Them)

I've made a few of these myself, and I see them all the time.

Using boiling water. It seems like it would sanitize better, but it warps plastic and weakens glue. Warm water is sufficient with the right cleaning agent (shampoo).

Not drying thoroughly. Putting a damp brush in a drawer is asking for mildew. That musty smell is nearly impossible to remove. Patience is key.

Using harsh chemicals like bleach or dish soap. These can be too abrasive for brush materials and leave residues. Shampoo is designed for hair and scalp oils—it's the perfect cleaner.

Scrubbing too aggressively on natural bristles. You can break or splinter them. Gentle swirling in soapy water is enough.

Cleaning only when it's visibly clogged. By then, the buildup is severe. A quick weekly clean is easier than a monthly deep-clean battle.

When to Replace vs. When to Clean

Cleaning can extend a brush's life, but it's not immortal. Here's when it's time to let go:

Bristles are splayed, broken, or missing: A brush with damaged bristles can snap hair and won't style effectively.
The cushion base is permanently deflated or cracked: If it no longer has any bounce, it's not doing its job.
There's mold or a persistent foul odor that doesn't go away after a proper cleaning and complete dry.
The brush head is loose or wobbly on the handle, indicating internal damage.

If the brush is just dirty, even if it's very dirty, it can almost always be saved with the steps above.

Your Hair Brush Cleaning Questions, Answered

Can I use shampoo to clean my hair brush?

Absolutely—it's the ideal cleaner. Shampoo is specifically formulated to break down the exact types of oils, sweat, and product residue that build up on your brush. Clarifying shampoos are particularly effective for heavy buildup. It's a perfect, cost-effective match.

How often should I really wash my hair brush?

For most people with average product use, every two weeks is a good routine. If you use a lot of heavy products (gels, waxes, dry shampoo), have an oily scalp, or are sick, aim for weekly. A quick visual and sniff test never lies—if it looks grimy or smells off, it's time.

Can I put my hair brush in the dishwasher?

I strongly advise against it. The intense heat and harsh detergent can destroy the brush. It can melt plastic, warp bristles, and ruin any cushioning. The high-pressure spray can also force water deep into places it shouldn't go, leading to mold. Hand washing is safer and gives you control.

What about brushes with wooden handles?

The key is to keep the wood dry. Only submerge the bristle head in your cleaning bath, keeping the wooden handle out of the water. After cleaning the head, immediately wipe down the wooden handle with a dry cloth to remove any splashes. Let the whole brush air dry in a position where water won't seep into the wood grain.

My brush has a strong smell even after washing. Help!

A persistent smell usually means moisture (and potentially mold) is trapped inside. First, ensure you followed the complete drying protocol—48 hours bristles-down. If the smell remains, try a soak in a mixture of warm water and a few drops of tea tree oil, known for its antifungal properties. Scrub thoroughly and rinse. If it still smells, the internal padding may be contaminated, and it's likely time to replace the brush.