How To Wash a Waterproof Mattress Cover: Simple Steps and Common Questions

If you’re wondering How To Wash a Waterproof Mattress Cover without damaging its protective layer, you’re not alone. Waterproof covers are designed to protect your mattress from spills and stains, but they need the right kind of care to keep working properly. This FAQ-style guide walks you through what to do, what to avoid, and how often to wash.

What exactly is a waterproof mattress cover?

A waterproof mattress cover (often called a protector) is a removable layer that fits over your mattress. It usually has:

  • A soft fabric top (cotton, polyester, bamboo-blend, etc.)
  • A thin waterproof backing (often polyurethane or similar material) that blocks liquids

Because of this delicate waterproof layer, washing it correctly matters. Harsh heat, strong detergents, or rough cycles can cause peeling, cracking, or loss of protection over time.

How To Wash a Waterproof Mattress Cover: Step-by-step

Here’s a general process that works for most covers. Always check the care label first, and follow it if it differs.

1. Check the care label

Before anything else, read the tag. It usually tells you:

  • Recommended water temperature
  • Whether machine wash is allowed
  • If tumble drying is safe
  • Any specific “do not” instructions (no bleach, no fabric softener, no ironing, etc.)

2. Pre-treat stains (if needed)

If there are visible stains:

  • Gently blot fresh spills with a clean cloth to remove excess liquid.
  • Apply a mild detergent solution to stained fabric areas only (avoid soaking the waterproof backing).
  • Let it sit a few minutes, then wash as directed.

Avoid harsh stain removers, as they can weaken the waterproof layer or discolor the fabric.

3. Use a gentle machine cycle

Most waterproof mattress covers can be washed in a home washing machine:

  • Choose a gentle or delicate cycle
  • Use cold or warm water (hot water can damage the waterproof membrane)
  • Add a small amount of mild, liquid detergent

Avoid:

  • Bleach (can break down the backing)
  • Fabric softener (may coat the surface and reduce breathability)
  • Overloading the machine (too much weight increases friction and stress on seams)

4. Rinse thoroughly

A full rinse cycle helps remove all detergent, which can otherwise stiffen the fabric or irritate sensitive skin. Some people prefer running an extra rinse if detergent residue is a concern.

5. Dry carefully

Drying is where many covers get damaged.

General guidelines:

  • Low heat tumble dry or air dry
  • Remove promptly when dry to reduce wrinkles and prevent overheating
  • Ensure the cover is fully dry before putting it back on the mattress to avoid moisture buildup

Avoid:

  • High heat (can melt or crack the waterproof layer)
  • Ironing (direct heat can damage the backing)
  • Long, very hot dryer cycles

If in doubt, air drying on a clothesline or drying rack is a gentle option, even if it takes longer.

How often should you wash a waterproof mattress cover?

For typical use, many people wash their waterproof mattress cover every 1–2 months. You may want to wash more often if:

  • Someone has accidents, heavy sweating, or spills
  • There are allergens like dust or pet dander to manage
  • You notice odors or visible dirt

After any spill, accident, or major mess, it’s best to wash the cover as soon as practical to prevent lingering odors and staining.

Can you wash a waterproof mattress cover with other laundry?

Yes, with some care:

  • Wash with similar lightweight items (sheets, pillowcases, light blankets)
  • Avoid heavy items like towels or jeans that can create extra friction
  • Keep zippers closed and elastic edges untwisted to help the cover keep its shape

Mixing with a small load of soft linens can help balance the washer and reduce wear.

What common mistakes should you avoid?

Here are frequent issues and how to prevent them:

  • Using hot water or high heat drying
    Can cause peeling, cracking, or warping of the waterproof layer.

  • Adding bleach or fabric softener
    May weaken the membrane or leave residue on the surface.

  • Scrubbing aggressively
    Vigorous scrubbing, especially on the backing, can thin or tear the protective layer.

  • Skipping the care label
    Different covers may have different materials; the label gives the safest instructions.

How do you know if the waterproof layer is damaged?

Signs your cover may not be fully waterproof anymore include:

  • Cracking, flaking, or peeling on the underside
  • Areas that feel sticky, stiff, or brittle
  • Leaks onto the mattress despite proper use

If you notice these, the cover may no longer offer full protection and might need to be replaced.

✅ Quick Mattress Takeaways

Key points consumers should understand about How To Wash a Waterproof Mattress Cover

  • Always check the care label first; it overrides general advice.
  • Use a gentle cycle with cold or warm water, not hot.
  • Avoid bleach, fabric softener, and high heat, as they can damage the waterproof layer.
  • Tumble dry on low or air dry, and make sure the cover is fully dry before use.
  • Wash every 1–2 months, or sooner after spills, accidents, or heavy use.
  • Inspect the backing regularly for cracking, peeling, or stiffness that may mean reduced waterproofing.

Caring for a waterproof mattress cover is mostly about gentle washing and careful drying. By following the steps above, you help maintain both cleanliness and long-term protection for your mattress.