Machine wash at 30°C, on their own, with a dedicated microfibre detergent, no fabric softener, then air dry. Do that after every use and a good towel will stay absorbent for years. Get any one of those steps wrong — particularly the softener — and you can ruin a brand new towel in a single wash.
Microfibre is not a cloth in the way a cotton towel is a cloth. It is a synthetic fibre split into strands many times finer than a human hair, and its cleaning power comes entirely from the microscopic gaps that splitting creates. Anything that fills those gaps — softener, detergent residue, or melted fibre — stops the towel working.
This guide covers the six rules that keep them open — and what to do if a towel has already gone wrong.
The 6 Rules At A Glance
| Rule | Why it matters | What happens if you ignore it |
|---|---|---|
| Wash separately | Microfibre attracts and holds lint | The towel becomes a lint magnet and leaves fibres on glass and paint |
| Wash at 30°C | Cleans without stressing the fibre | Heat softens and flattens the pile permanently |
| Microfibre detergent | Rinses clean, leaves nothing in the pile | Residue and optical brighteners build up and cause smearing |
| No fabric softener | Softener coats and blocks the split fibres | Permanent loss of absorbency, usually from the first wash |
| Air dry | Microfibre is a plastic fibre and heat sensitive | Melted, flattened pile that will not take up water |
| Sort by job | Keeps wheel and engine grime away from paintwork cloths | Brake dust and grit transferred straight onto your paint |
Wash Microfibre On Its Own
This is the rule most people break without realising, and it is the one that produces the classic complaint of a towel that "leaves bits everywhere".
Microfibre carries a slight static charge and an enormous surface area. Put it in a drum with cotton towels, jeans or t-shirts and it will strip lint off all of them and hold onto it. Once that lint is embedded in the pile it is very difficult to get back out, and the next time you use the towel on glass you will see every bit of it.
Wash microfibre with microfibre only. Nothing else in the drum. If that means running a smaller, more frequent load, run a smaller load — it is worth it.
Wash At 30°C
Duel microfibre is labelled for a 30°C wash, and that is genuinely all it needs. The instinct to turn the dial up is a cotton instinct: with a bath towel, heat does a lot of the cleaning. With microfibre, the detergent does the cleaning and the heat only does damage.
Microfibre is typically a polyester and polyamide blend, and both are thermoplastics. Sustained heat begins to soften and deform the fibres, and once the loops of the pile have flattened they do not spring back. That damage does not wash out and it cannot be repaired. A 30°C cycle keeps the fibre structure completely intact.
Do not reach for a hotter wash. Pre-soak the cloth in warm water first to loosen ground-in contamination, then run it at 30°C as normal. The detergent does the work, not the heat.
Use A Microfibre Detergent, Not Household Powder
At 30°C the detergent is doing all of the work, so which one you use matters more than it would on a hot cotton wash. Ordinary laundry detergent is designed for cotton, and it is designed to leave things behind: optical brighteners to make whites look whiter, perfumes, and conditioning agents. On a bath towel none of that matters. In a microfibre pile it all sits in the gaps between the split fibres and stays there.
The symptom is a towel that looks clean, feels clean, and then smears on glass or leaves a haze on a freshly polished panel. That is detergent residue being reactivated by moisture, not dirt.
A dedicated microfibre detergent is built around mild surfactants that lift oils and road film out of the pile and then rinse away completely, with no brighteners, softeners or heavy fragrance left behind.
Built on mild surfactants that release oils, waxes and road film from the pile, then rinse out clean. No softeners, no brighteners, no residue. 500ml, eucalyptus.
Never Use Fabric Softener
If you take one thing from this guide, take this one.
Fabric softener does not clean anything. It works by depositing a thin layer of lubricating, waxy conditioner onto fibres so they feel smoother against skin. On cotton, that is the entire point. On microfibre, that coating fills and seals the split fibres that do all the work, and the towel simply stops absorbing.
People usually notice it as a towel that suddenly "pushes water around" instead of soaking it up, or one that beads water on the surface. At that stage most of the damage is already done, and in many cases it cannot be fully undone.
Tumble dryer sheets — which are effectively softener in solid form — and to detergents with a built-in conditioner. Read the bottle. If it mentions softness, care or conditioning, it does not belong anywhere near your microfibre.
Air Dry, Never Tumble Dry
Air drying is not the cautious option, it is the instruction. Duel microfibre is labelled air dry, and there is no version of a tumble dryer that improves on hanging a towel up.
Heat is the second most common way people ruin a good towel, after softener. The loops of the pile soften, flatten and fuse together, and a towel with a flattened pile has lost most of its surface area and most of its capacity. Dryer sheets make it worse again, because they deposit the same waxy coating as fabric softener. Hang the towels somewhere with airflow and they will be dry in a few hours.
Avoid leaving damp microfibre screwed up in a bucket or a boot overnight. It will develop a musty smell that is genuinely difficult to wash out, and on a drying towel that smell will transfer straight onto your paintwork.
Sort Your Towels By Job
Not all microfibre in your kit does the same work, and it should not all live in the same pile. A cloth that has been used on wheels has had brake dust driven into it. Brake dust contains hard metallic particles, and those particles do not always come out in a normal wash.
Colour coding makes this effortless, which is why detailing microfibre comes in different colours. Pick a colour per job and stick to it.
How Often Should You Wash Microfibre Towels?
After every use. Not once a month, not when they look dirty.
Even on a car that was already clean, a drying towel picks up traces of shampoo, wax residue, dissolved road film and minerals from your water supply. If that dries into the pile it makes the towel slick and less absorbent next time, and it is much harder to remove once it has dried in than it is when fresh.
If you cannot get to the machine straight away, rinse the towel in clean water and hang it up rather than leaving it damp and folded. Then wash it properly when you can.
How To Wash A Car Drying Towel
A drying towel is the most important microfibre item you own, because it makes direct pressured contact with your paint at the very end of the wash when there is no lubrication left. It gets a little extra care.
If a drying towel hits the ground, retire it from paintwork. Grit driven into a loop pile does not reliably come out in the wash. It can still be useful on sills, shuts and wheels — but not on paint you have just spent an hour cleaning.
Our Triple Twisted Loop Drying Towel is 1400GSM double-sided twisted loop, and it ships with a storage bag — a closed bag keeps workshop dust and grit out of a clean pile between washes.
Can You Revive A Microfibre Towel That Has Gone Hard Or Stopped Absorbing?
Sometimes — and it depends entirely on the cause.
A towel that will not come back is not necessarily rubbish. Demote it to wheels, arches, door shuts or general workshop duty, where absorbency matters far less than it does on paint.
Frequently Asked Questions
Can you tumble dry microfibre towels?
What temperature should you wash microfibre at?
Why can't you use fabric softener on microfibre?
How do you wash a car drying towel?
Can I use washing up liquid or normal detergent instead?
Why does my microfibre cloth leave streaks on glass?
How many times can you wash a microfibre towel?
Do I need to wash new microfibre before using it?
Keep The Gaps Open
Microfibre works because of gaps that are far too small to see. Every rule in this guide comes down to the same principle: keep those gaps open. Wash it separately, wash it at 30°C, use something that rinses clean, keep softener and heat well away from it, and keep the dirty cloths away from the clean ones.
Do that and a drying towel that cost you twenty pounds will still be pulling water off your paintwork in five years' time.
Mild surfactants built to lift road film and oils out of microfibre pile, then rinse away completely with no softeners, brighteners or residue. Laundry — £10.95.