How to Clean a Bed Mattress | The Straightforward Method

Clean a bed mattress by vacuuming every surface, spot-cleaning stains with cold water, deodorizing with baking soda, and letting it dry completely before remaking the bed.

Most people only clean their sheets, but a mattress collects dust, dead skin, and the occasional spill for years. The good news is that a thorough cleaning takes about two hours of mostly waiting. A standard routine—vacuuming, spot-cleaning, and deodorizing—keeps your sleep surface fresh between deep cleans. You only need a vacuum, a mild detergent, and baking soda.

A Simple Four-Step Cleaning Routine

You can clean your mattress effectively in four steps, in this order. Each one builds on the last, so don’t skip around.

1. Strip the bedding. Remove the sheets, pillowcases, and any mattress protector. Wash them per the care instructions—use hot water for cotton and synthetic blends.
2. Vacuum the mattress. Attach the upholstery tool to your vacuum and go over the entire surface. Pay special attention to the seams and edges, where dust and debris collect. Vacuum both sides if you can lift the mattress.
3. Spot-clean stains. Mix a few drops of mild dish soap with cold water. Dip a white cloth into the solution, wring it out well, and blot the stain—don’t rub. Work from the outside edge of the stain toward the center to keep it from spreading.
4. Deodorize with baking soda. Sprinkle a light, even layer of baking soda across the mattress. Let it sit for at least 15 minutes, then vacuum it all up.

What Not To Do When Cleaning A Mattress

Three common mistakes turn a simple cleaning into a bigger problem. Making any of these can damage the mattress or force you to redo the job.

Don’t soak the mattress. Too much moisture damages foam layers and can take days to dry completely. Dampness also risks mildew growth deep inside. Use only a slightly damp cloth, never a wet one.

Don’t scrub stains. Scrubbing pushes the stain deeper into the fibers and can fray the fabric. Blotting with a clean cloth lifts the stain gradually without spreading it.

Don’t remake the bed until the mattress is completely dry. Trapping moisture under fresh sheets invites mildew. If you cleaned a stubborn spot, point a fan at the area or open a window to speed things up.

How To Handle Stains And Removable Covers

Blood, urine, and sweat stains need slightly different treatment than general grime. For blood, use cold water only—hot water sets the protein stain permanently. For urine or sweat, a gentle enzyme cleaner breaks down the proteins and odors. Blot the area, let the cleaner sit for a few minutes, then blot again with a clean, damp cloth.

If your mattress has a removable cover, follow the manufacturer’s washing instructions. Some covers come off and machine-wash easily; others are not meant to be removed at all. Check the care label sewn into the mattress before doing anything. Cleaning methods genuinely vary by mattress type and cover construction, as the Sleep Foundation notes.

When a cover isn’t removable, surface cleaning is your primary option—it’s the same four-step routine, done a bit more gently.

How Often Should You Clean Your Mattress?

This regular maintenance controls dust mites and keeps the surface fresh. Spot-clean spills the moment they happen—a fresh stain is far easier to lift than one that has set.

For a go-to list of effective cleaning products, see our tested roundup of bed cleaning products worth buying.

The process stays the same every time: strip, vacuum, spot-clean, and deodorize. You don’t need special equipment or expensive sprays. A clean mattress makes a real difference in how your bed feels—and in how well you sleep on it.