How to clean a mattress without damaging it
By the Morfeo sleep team, mattress manufacturers in Yecla (Murcia) · Updated in September 2026
Quick answer
You don't wash a mattress: you dry clean it using as little moisture as possible. The routine that works involves four steps —vacuuming, treating the stain, using baking soda for odors, and drying it completely— and takes about 40 minutes. What ruins most mattresses isn't dirt, it's water: if it soaks through to the inside, it never dries and ends up growing mold where you can't see it. No steam, no bleach, no soaking.
In this guide
We wrote this at the factory, where we see the mattresses that come back. And they come back more often because of poorly done cleaning than because of defects: mattresses soaked with steam, treated with bleach, or only partially dried. A mattress is a multi-layered sponge; what goes in takes days to come out.
What you need (and it's not expensive)
Vacuum cleaner with a narrow nozzle
It's the tool that does the most. The upholstery nozzle reaches the seams, which is where everything accumulates.
Baking soda
For odors. It absorbs moisture and neutralizes them, and then you vacuum it up. One supermarket box is more than enough.
White cloths and cold water
White so they don't transfer dye onto the fabric. And cold: hot water sets organic stains instead of removing them.
The 4-step routine
- Strip the mattress and vacuum it entirely. The entire surface, the sides, and especially the seams and folds. If you have allergies, go over it twice and slowly: what gets rid of dust mites is the vacuuming time, not the power.
- Treat stains one at a time, without soaking. Dampen the cloth, never the mattress, and work from the outside in on the stain so it doesn't spread. Dab and lift, don't rub: rubbing pushes the stain into the foam.
- Cover with baking soda and wait. A thin layer over the entire surface and at least one hour; if there's a persistent odor, leave it overnight. Then, vacuum thoroughly again.
- Dry it completely before dressing it. Open window, airflow, and, if possible, a fan pointed at the mattress for a few hours. Dressing a mattress that is still damp is the fastest way to grow mold.
What you should never do
| Yes | No | Why |
|---|---|---|
| Damp cloth | Soaking or wetting with a hose | Water gets down into the foam and doesn't dry: mold and permanent odor |
| Cold water | Hot water | Heat coagulates the proteins from sweat, urine, or blood and sets the stain |
| Baking soda | Bleach | It yellows the fabric, weakens it, and leaves a residue you'll sleep on |
| Air drying | Steam cleaner | It forces hot water under pressure into the core. It's the mistake that ruins the most mattresses |
| Vacuuming slowly | Dryer or radiator pressed against it | Direct heat deforms memory foam |
How often to do it
- Vacuuming: once a month. It gives the most results for the time invested.
- Deep cleaning: twice a year. Good times: when changing the duvet in autumn and storing it in spring.
- Rotating it head-to-foot: every six months. Single-sided mattresses, like ours, are not flipped: they are only rotated.
- Airing: every day, for 10 minutes with the sheets removed and the window open. About half a liter of moisture is released every night, and it needs to escape.
Stains, odors, and dust mites
Every problem has its method and its product:
And the odor: if it returns a few days after a deep cleaning, it's not surface dirt. It's moisture trapped inside the mattress, and that can no longer be removed by cleaning.
Sweat, saliva, and skin cells stay on a fabric you can put in the washing machine (at 30 °C maximum), instead of on the mattress, which you cannot wash. Fitted sheet style, with an elastic perimeter.
Two answers
Can it be fixed by cleaning it?
What's wrong?
How old is the mattress?
A layer of baking soda overnight, vacuum thoroughly, and dry with airflow. Then put on a breathable protector: the odor comes from the moisture the mattress absorbs every night, and that moisture stays on a fabric you can wash.
Every type of stain has its treatment, and none use hot water. Afterward, a waterproof and breathable protector prevents it from happening again: the Tencel one is the most affordable option.
Vacuuming slowly every week greatly reduces the dust mite load, but what really stops the problem is a washable barrier between you and the mattress.
After more than 8 years, the odor that returns after cleaning is moisture accumulated in the core. It won't come out. It's time to replace it, and this time with a protector from day one.
After more than 8 years, before you start cleaning, look at the mattress from the side at eye level. If you can see the valley where you sleep, the stain is the least of your problems.
An old mattress accumulates moisture and debris in layers that the vacuum cleaner cannot reach. If you wake up congested every morning, replacing it changes more than any cleaning.
Morfeo mattresses are tested for 100 nights at home and come with a 10-year warranty.
Frequently asked questions
Can you wash a mattress with water?
No. It can only be cleaned on the surface, with a damp cloth, and never the mattress itself. Water that gets into the foam does not dry and ends up causing mold and a permanent odor.
Is a steam cleaner useful?
It's the most common mistake. Steam forces hot water under pressure into the mattress, and the heat can also deform the memory foam layers. We do not recommend it under any circumstances.
What is baking soda used for?
It absorbs moisture and neutralizes odors. Sprinkle a thin layer, leave it for at least one hour —preferably overnight— and vacuum thoroughly. It doesn't remove stains: to do that, you need to treat them one by one.
Can you use bleach or ammonia?
No. They yellow the fabric, weaken it, and leave a chemical residue right where you'll breathe for eight hours. Besides, they're not necessary: diluted hydrogen peroxide works better on organic stains.
How often should you clean the mattress?
Vacuum once a month and do a deep cleaning twice a year. Airing it for ten minutes every day with the sheets removed does more than any product.
Is a professional cleaning worth it?
It might make sense once, with a dry cleaning service. But if the mattress is more than eight years old or looks sagged, that money is better invested in replacing it.
Do you need a protector if you already clean the mattress often?
Yes, because they're different things: cleaning repairs what has already gotten in, the protector prevents it from getting in. The sweat from every night reaches the fabric of the mattress, which cannot be washed; the protector, on the other hand, goes in the washing machine (Morfeo's, at 30 °C maximum).
When should you throw away the mattress instead of cleaning it?
If you can see a valley where you sleep, if the odor returns a few days after cleaning it, or if you wake up congested every morning. Those three symptoms cannot be fixed by cleaning.
Can it no longer be fixed by cleaning it?
Mattresses made in Yecla (Murcia). 100-night trial, 10-year warranty, and free shipping to the mainland.
