A mattress pad sits under the sheet, out of sight, taking sweat and body oil every night of the year. It is the most used item on the bed and usually the least washed, and a fair share of them get ruined the first time somebody finally does wash one properly.
Four kinds of mattress pad, and why the difference decides everything
The word covers products that have almost nothing in common once they reach a machine.
A quilted fitted pad is a thin layer of polyester or cotton fill quilted between two fabric faces, with an elastic skirt. This is the standard one and it is washable.
A thin fitted topper is similar but thicker, sometimes with a wool or cotton fill layer, and it is usually washable with more care and much longer drying.
A thick foam topper, memory foam or latex, is a slab of foam with no fabric structure holding it together. It is not washable in any machine at any setting.
A waterproof backed pad has a laminate or a membrane bonded to the underside. It is washable, but the membrane sets hard limits on heat.
Work out which one you have before anything else, because the correct treatment for one of them destroys another.
Foam toppers do not go in a machine
This one is absolute rather than cautious.
Foam is a cell structure, and machine agitation tears and crushes those cells. A foam topper that has been agitated comes out crumbling and never recovers its shape.
Wet foam is also extraordinarily heavy. A queen topper holds an enormous volume of water, and the weight alone can damage both the foam and the machine.
It cannot be dried either, because the interior stays saturated long after the surface feels dry, and foam left damp inside develops a smell that does not come out.
The correct approach is surface only. Vacuum it, spot clean marks with a barely damp cloth and a very small amount of mild detergent, blot rather than rub, and let it air dry completely with air moving across both faces before it goes back on the bed.
If a foam topper has a zip off cover, that cover usually washes normally. The foam itself stays out.
Waterproof backing and what heat does to it
The waterproof layer is a thin polyurethane film laminated to the fabric, and it is the part that fails.
High heat softens and then degrades that film. It cracks, it separates from the fabric behind it, and it starts peeling away in sheets.
That is the answer to why a waterproof pad stops being waterproof after a year or two. It is almost always the dryer rather than the washing.
Wash on warm at most and prefer cool. Dry on low or on the no heat air setting, and accept that it takes considerably longer.
Never iron one and never drape one over a radiator.
Skip fabric softener on these as well, since the coating it leaves interferes with how the fabric face handles moisture and does the film no favors either.
A crinkling sound that gets louder over time, or a stiff plasticky feel, means the film is already breaking down.
Elastic skirts and fitted corners
The elastic is the second thing to fail, and for exactly the same reason.
Elastic is rubber or spandex, and heat is what kills it. Repeated hot drying leaves the skirt stretched and slack, and a pad that will not stay on the mattress is finished in practice even if the pad itself is fine.
Wash and dry on lower heat and the elastic lasts several times as long.
Pull the pad out of the dryer while it is barely warm rather than letting it sit through a long cool down under its own weight.
A slack skirt can sometimes be saved by taking a tuck in the elastic with a few stitches at each corner, which is quicker and cheaper than replacing the whole thing.
Do not stretch a damp skirt to fit while putting it back on the bed. Let it dry first, because damp elastic held under tension tends to stay that way.
How often to wash a mattress pad
Most people wash one when they happen to think of it, which is not often enough.
Every two to three months is a reasonable rhythm for a quilted pad in normal use.
More often through summer, when there is more sweat going into it, and more often for anyone who runs warm at night.
Straight away after any spill, and straight away after anyone has been unwell in the bed.
A pad gone grey or yellow across the middle is telling you it has been absorbing for a long time without a wash.
Washing it more often is also gentler in total than washing it rarely and then needing a hot aggressive cycle to deal with everything that built up.
Washing a quilted mattress pad
Shake it out first, outdoors if you can, since a pad holds a surprising amount of dust and skin cells.
Wash it alone or with one or two light items. A pad fills a drum by itself and needs room to move for water to get through the quilted layers.
Warm water, a normal cycle, and a mild detergent at a normal dose. Cool water for anything with a waterproof backing.
Do not overdose the detergent. Quilted fill traps residue the way any fill does, and residue is what makes an old pad feel stiff and look grey.
Run an extra rinse. Getting water back out of quilted fill is the same problem as getting it in.
Skip chlorine bleach on a discolored pad. It weakens the fill and the stitching, and it does not restore white to fabric stained with body oil, which responds better to an oxygen based product and a longer soak.
Use a high spin at the end. It is the cheapest way to remove water from something this absorbent, and it saves a long stretch of dryer time.
Drying, which takes longer than it looks like it should
A mattress pad holds far more water than its appearance suggests, because quilted fill is mostly air space and air space fills with water.
Dry on low heat and give it a long cycle. High heat on a thick pad cooks the outer faces before the middle is dry, and it is exactly what destroys elastic and waterproof film.
Stop it partway through, pull it out, shake it, and turn it over. Quilted pads bunch, and the folds stay wet inside.
A couple of dryer balls help by keeping the layers separated, which is the main obstacle with an item this bulky.
It has to be completely dry before it goes back on the bed. A pad still damp in the middle then sits between a sheet and a mattress with no airflow at all, which is how a smell starts.
Check the middle by pressing it against the back of a hand rather than by touching the surface. Surfaces dry first and they lie to you.
Storage and knowing when to replace one
Store a spare pad completely dry, folded loosely, in a breathable bag or a cotton pillowcase rather than sealed plastic.
Sealed plastic traps whatever moisture is left and gives it months to work on the fill.
Keep it off a basement floor and out of an attic, since both cycle through humidity and temperature ranges that fabric does not enjoy.
Replace a quilted pad when the fill has flattened and shifted into the corners and no longer gives an even layer, which usually happens after a few years of regular use.
Replace a waterproof pad when the backing cracks or peels, because there is no repair for a film that has come away from its fabric.
Replace any pad with a slack skirt that stitching cannot fix, and any pad with an odor that survives a proper wash and a full dry.
A pad is a consumable protecting something far more expensive, which is the right way to think about when to let one go.
The Rockville part
Four things about this area bear on how long a mattress pad lasts.
Humid summers are the first. Thick quilted items dry slowly when the air is already carrying moisture, and the temptation is to turn the heat up to compensate. That is the single most damaging thing you can do to a waterproof backing or an elastic skirt. Use low heat and more time instead, and pull the pad out to shake and turn it partway through.
Hard water is the second. Mineral rich water leaves deposit inside quilted fill, which is what makes an older pad feel stiff and look dull. Use a moderate detergent dose and add a rinse, since minerals and detergent together are harder to flush out of fill than either one alone.
Cold winters and a long indoor heating season are the third and fourth, and they arrive together. Heating dries the indoor air, which raises static and makes synthetic pad faces cling and crackle coming out of the dryer. It also means people sleep under more layers with less ventilation, so a pad works harder through the winter than the season suggests. Washing one partway through the heating season rather than waiting for spring is a sensible habit here.
Where a full sized pad has room to wash
A mattress pad only comes clean if water can move through the quilted layers, and that needs space.
The machines at our self-service laundry on Rollins Avenue carry the water volume and drum size a king pad or a bulky quilted topper needs, so the item can open out and move rather than sitting as a packed wet block that water never gets through.
Our machines and the store are cleaned daily.
Our wash-dry-fold service covers the everyday laundry.
For general guidance, The American Cleaning Institute publishes a laundry basics guide that is a useful cross-check.
The short version
A mattress pad absorbs sweat and body oil every night and gets washed less than anything else on the bed. Quilted fitted pads wash normally on warm with an extra rinse. Waterproof backed pads carry a laminated film that high heat cracks and peels, which is why they stop being waterproof, so keep them cool and dry them low. Foam toppers never go in a machine at all, since agitation destroys the cell structure and the interior never dries. Heat is also what kills the elastic skirt. Wash every two to three months, dry on low for a long time, shake and turn it partway through, and make sure the middle is dry before it goes back on the bed.
WaveMAX Rockville is at 180 Rollins Ave, easy to reach from Rockville and the surrounding area. If you have bedding that will not fit at home, call us at 240-444-1350.