How to clean a mattress, and the habits that double its life

You spend a third of your life on it and probably clean it never. A mattress needs surprisingly little — one honest session a year plus two cheap habits — and the reward is years of extra life for the most expensive thing in the bedroom.

The annual session

Strip everything and wash the bedding hot per its labels while the mattress breathes. Vacuum the whole surface — seams, tufts, piping — with the upholstery tool; the dust-mite material and skin flakes leave with the airflow. Spot-clean stains with a barely-damp cloth and a small amount of mild detergent, dabbing never soaking: a wet mattress is a mould problem waiting for a calendar slot, so let it dry fully — hours by an open window or a fan — before anything touches the bed again. Memory foam especially drinks water and resents it; damp-cloth-only is the foam rule.

The two habits that actually matter

Rotate head-to-foot every few months (flip only if the manufacturer says the mattress is double-sided — most modern ones are one-sided and flipping damages them). Rotation spreads the compression so the surface ages evenly. Use a washable protector. The cheapest insurance in homecare: sweat is the slow killer of foams and fabrics, and a protector launders what the mattress otherwise absorbs. Pair with the bedding rhythm in the washing-machine guide and the bedroom moisture context in condensation and ventilation — a damp bedroom ages a mattress from beneath.

Replacement, honestly

Sag you can see, dips that swallow a rolled tennis ball, springs announcing themselves, or mornings that hurt in beds you did not hurt in elsewhere — those are replacement signals, not cleaning failures. A mattress that has simply aged clean but tired is a budget decision; a mattress with structural sag is a health decision. Everything else on this page is how you push that decision years into the future.