How to Clean Bedding and Keep White Sheets Bright

The short version: wash sheets and pillowcases every week or two, wash comforters about once a month, use warm water with a regular detergent, rinse well, and skip chlorine bleach on whites. Most gray or yellow sheets are a washing, water or storage problem, not a worn-out-fabric problem.

It's very common for white bedding to go dull, so don't feel bad if yours has. Below is how to wash everything on the bed, how to get dingy sheets white again, and a few design choices that help white look white.

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How often should you wash your sheets?

Purdue Extension says bedsheets and pillowcases should be washed at least every two weeks. The same page says blankets and comforters should be washed monthly, and that includes weighted ones.

If a dog or cat sleeps on the bed, I'd lean toward weekly. Pet allergens are easily spread and, per the National Institute of Environmental Health Sciences, they can stay on carpets and furniture for months. Fabric on a bed is no different.

How to wash bed sheets in a washing machine

1. Read the care label first. It sets the maximum water temperature for that fabric.
2. Shake out pet hair outside, or brush it off with a damp sponge or rubber brush. Lint rollers work, but a damp sponge pulls hair off without leaving residue.
3. Wash sheets on their own, or with similar items. Don't overload the drum: sheets need room to move, or detergent stays trapped in the folds.
4. Use warm water and the amount of detergent the bottle recommends. An enzymatic detergent helps with body oils and sweat.
5. Add an extra rinse for whites. Leftover detergent is a common reason sheets look gray and feel stiff.
6. Dry fully on a medium setting, or on a line. Damp sheets folded into a closet smell musty.

Hard water deserves a mention. Minerals keep detergent from dissolving properly and leave a film that attracts dirt. If your towels feel crunchy, try a water conditioner in the wash and the hottest setting the label allows.

Why do sheets turn yellow?

Body oils and sweat build up in the fibers and oxidize over time. Washing with too little detergent, hard water, and storing sheets that weren't fully clean all make it worse.

Chlorine bleach is not the fix. On bedding that holds body oils and proteins, it can set yellow stains and it weakens cotton, and frayed fibers look duller. Also check the light: a 2700K "soft white" bulb casts a warm glow that makes white linen look cream. Bulbs around 3000K read cleaner.

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How to get dingy sheets white again

Start with a hot-as-the-label-allows wash with enzymatic detergent and an extra rinse. If that's not enough, try this reset:

• Half a cup of baking soda in the drum with the sheets.
• Half a cup of white vinegar in the fabric softener dispenser.
• Regular detergent, warm water, extra rinse.

Baking soda helps lift surface soil, and vinegar helps break down detergent and mineral residue. Never mix vinegar and bleach. A bluing agent is a gentler option for a yellow cast: a trace of blue pigment offsets yellow so the fabric reads whiter. Sun drying also helps.

How to wash a comforter and duvet

Wash the duvet cover with your sheets. For the insert or comforter, check the label, then use a large-capacity machine, because a small drum compresses the filling and leaves wet spots. Run a gentle cycle with a little detergent and an extra rinse.

Dry on low with a few clean wool dryer balls or tennis balls to break up clumps, and make sure it's completely dry before using it. Many people, and I'd count myself in, find a duvet cover the easiest layer to keep clean, since it's the one you wash most. Monthly is the interval Purdue suggests for comforters.

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How to wash pillows

Most polyester-fill and many down pillows can go in the machine, but check the label. Wash two at once so the drum stays balanced, use a gentle cycle, and rinse twice. Dry on low until no damp spots remain, which can take more than one cycle. Use a pillow protector under the pillowcase to keep oils out between washes.

How to clean a mattress

1. Strip the bed and vacuum the surface with an upholstery attachment.
2. Spot-treat stains with a small amount of mild detergent on a damp cloth. Blot, don't scrub.
3. Sprinkle baking soda over the surface, wait a few hours, then vacuum it up.
4. Let it air out fully before putting sheets back on.

For pet accidents, avoid ammonia-based cleaners. The Ohio State Indoor Pet Initiative notes that the smell may attract the cat back to that area. For anything that persists, check with your vet. A waterproof mattress protector is cheap insurance.

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Choose and store sheets so white stays white

Percale has a matte finish and reads as crisp white. Sateen has a sheen that picks up the colors of warm floors and walls, so it can look creamier. Very high thread counts aren't automatically better: a 200-400 count percale tends to breathe well.

For storage, keep sheets in a breathable cotton bag or pillowcase, not a sealed plastic bin, and line wood shelves with acid-free liners. Rotate sets so one doesn't sit unused for a year.

If a pet sleeps on the bed, a washable throw at the foot catches most of the hair and dirt. A textured light throw hides hair better than a flat sheet. For more on cleaning other soft furnishings, see removing lint from a blanket and more ways to brighten white sheets.

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Remake the bed

Put the fitted sheet on first, then the flat sheet, then the duvet. If the room is all white, vary the textures (smooth percale, a chunky throw, a nubby headboard) so shadows give the bed depth. One darker accent, like a charcoal pillow, makes the white look brighter by contrast.

Frequently asked questions