Your weighted blanket soaks up more than sweat. Dead skin cells settle into the fabric and feed dust mites, so the blanket you sleep under every night slowly becomes a place they thrive. That is the real reason to clean a weighted blanket on a schedule, not just when it looks grubby.
The catch is the weight. A 15-pound blanket roughly doubles in weight once it is wet, and the wrong cycle can warp the beads or throw your machine off balance. The safe method depends entirely on what is inside, whether that is glass beads, plastic poly pellets, an organic filler, or a removable cover.
Here is how to clean a weighted blanket without wrecking the filler, the fabric, or your washer.
Key Takeaways
- Check the filler first. Glass beads and plastic poly pellets are machine washable, but organic fillers like rice, beans, and corn rot when wet and can only be spot cleaned.
- Match the machine to the load. Your washer capacity should be at least double the blanket’s dry weight, since a wet blanket weighs about twice as much; take anything over 20 pounds to a laundromat.
- Wash on a gentle cycle in cold to lukewarm water (about 90 to 110 degrees Fahrenheit) with a little liquid detergent. Hot water warps poly pellets and can make glass beads brittle.
- Skip fabric softener and bleach, which coat the fibers and weaken the stitching that holds the weight in place, then air dry flat for 24 to 48 hours.
How to Machine Wash a Weighted Blanket
You can machine wash many weighted blankets, but there is a catch. You must ensure your blanket does not use organic fillers like rice, corn, or beans. Those will turn into a moldy mess if they get wet. If your blanket contains plastic poly pellets or glass beads, you are usually in the clear.
Also consider the weight, and not just the blanket’s. Most home washers safely handle a load up to about 15 to 20 pounds, and heavier blankets need a large-capacity commercial machine or a hand wash (1). A good rule is that your washer’s capacity should be at least double the blanket’s dry weight, because the fabric soaks up water and roughly doubles in weight during the wash. A 15-pound blanket effectively becomes a 30-pound load. Anything over 20 pounds can unbalance a top loader and trip an error code mid-cycle, so a large-capacity front loader or a laundromat machine is the safer bet (2).
- Time: 2-3 Hours
- Difficulty: Beginner
What You’ll Need
- Washing Machine (Large capacity preferred)
- Heavy-duty drying rack
- Mild stain remover
- Gentle laundry detergent (Bleach-free)
1. Prep and Remove Stains
Inspect the blanket for spills or bodily fluids. Treat these spots with a mild stain remover or an enzyme cleaner before the wash. Let the solution sit on the fabric for at least 15 minutes to break down the grime.
2. Wash the Weighted Blanket
Pour a small amount of mild detergent into the machine. Avoid using too much soap, as it is hard to rinse out of heavy layers. Place the blanket in the drum by itself; do not add towels or sheets, or the machine will become unbalanced.
Select a gentle or delicate cycle and set the temperature to cold or lukewarm, roughly 90 to 110 degrees Fahrenheit. Avoid hot water entirely, since high heat warps the fabric, melts plastic poly pellets, and can make glass beads brittle enough to crack.
3. Dry the Weighted Blanket
Remove the blanket immediately after the cycle ends to prevent moldy odors. If your care tag allows it, you can tumble dry on low heat. However, air drying is often safer for the longevity of the beads and stitching.
Lay the blanket flat on a sturdy drying rack. Avoid hanging it vertically on a thin clothesline, since the heavy wet weight can stretch the fabric and cause the filler to bunch up at the bottom. Air drying a weighted blanket takes about 24 to 48 hours and is the safest method for beads and delicate fabric (3), so shake and fluff it every few hours to help the inner beads dry evenly and stop moisture from getting trapped.
Weighted Blanket Care Guidelines by Type
Different fabrics require different tactics. A fuzzy fleece needs different care than a cotton cooling blanket. Always check the tag first, but here are the general rules.
Machine Wash and Tumble Dry
If the tag gives the green light for the dryer, you are in luck. Wash with mild detergent on cool/gentle. Transfer it to the dryer on a low-heat or air-fluff setting. Throw in a few dryer balls to keep the filler from clumping. Check it every 20 minutes to ensure it isn’t getting too hot.
Machine Wash, Air Dry
This is common for blankets with specific synthetic fillers. Wash it on gentle with cold water. When it comes out, lay it flat on a clean surface or a wide drying rack. Do not hang it by the corners. Shake it out occasionally to redistribute the beads as it dries.
Machine Wash, Cover Only
Many modern weighted blankets are essentially a heavy inner duvet inside a removable cover. This is the easiest scenario. Unzip and remove the cover. Wash the cover in the machine like a normal sheet. The heavy inner weighted section usually shouldn’t be washed often; spot clean it if necessary.
Spot Clean or Dry Clean Only
If your blanket uses organic fillers or delicate silk, do not soak it. Organic fillers such as rice, beans, corn, and barley rehydrate and swell once they get wet, then rot, grow mold, and attract insects, so they can never go through a full wash. For small stains, use a stain remover or a solution of water and mild dish soap. Scrub gently with a toothbrush, rinse with a damp cloth, and let it air dry. If the whole thing is dirty, take it to a professional dry cleaner.
How to Hand Wash a Weighted Blanket
If your machine is too small or your blanket is too delicate, the bathtub method is your best friend. Be warned: a wet weighted blanket is incredibly heavy. You might want a partner to help you lift it out when you are done.
- Time: 45-60 minutes
- Difficulty: Intermediate
What You’ll Need:
- Clean bathtub
- Stain remover
- Mild laundry detergent
- Sturdy drying rack
- Clean towels
1. Pretreat Stains
Spot treat any visible stains. Rub the detergent or remover in gently and let it sit while you prepare the tub.
2. Fill the Tub
Fill your bathtub about halfway with cool or lukewarm water. Avoid hot water.
3. Add Detergent
Pour in about half the amount of laundry detergent you would use for a regular load. Swirl it around with your hand until it is sudsy and dissolved.
4. Submerge and Soak
Place the blanket in the tub. Push it down until it is completely submerged. Let it soak for 15 to 30 minutes. This gives the soapy water time to penetrate the thick layers.
5. Agitate Gently
Use your hands (or clean bare feet) to knead the blanket. Rub the fabric against itself gently to loosen dirt. Avoid rough scrubbing, which can damage the pockets holding the beads.
6. Rinse Thoroughly
Drain the dirty water. Refill the tub with fresh, cool water. Knead the blanket again to push out the soap. You may need to drain and refill the tub 2 or 3 times until the water runs clear and no suds remain.
7. Remove Excess Water
Drain the tub. Roll the blanket up tightly against the side of the tub to squeeze out water. Do not wring or twist it; this can tear the internal weight pockets.
Pro Tip: Lay the wet blanket flat on large, clean towels. Roll the towels up with the blanket inside (like a sleeping bag) and step on the roll to absorb moisture.
8. Hang or Lay Flat to Dry
Move the blanket to a drying rack. Lay it flat so the weight is evenly distributed. If you must hang it, drape it over a shower rod or a very sturdy railing, but ensure it is balanced. Keep it out of direct sunlight to prevent fading.
Pro Tips
- No Ironing: Never iron a weighted blanket. The heat will melt internal plastic components.
- Grease Stains: Use a drop of dish soap with a degreaser to lift oily spots.
- Urine Stains: Use an enzyme-based cleaner to break down the proteins and remove odors completely.
FAQs
In Summary
Cleaning a weighted blanket comes down to knowing what is inside it. Match the filler to the method, keep the water cold to lukewarm, use a gentle cycle with mild detergent, and give it a day or two to dry flat. If the wet weight is more than your home machine can handle, a laundromat trip beats a broken washer. Do that a few times a year and your blanket stays fresh, hygienic, and ready for the next good night’s sleep.
