How to wash a weighted blanket at a laundromat

A weighted blanket isn’t like a regular blanket. The glass beads or polyfill sewn into pockets make it 4–6× heavier than it looks, and most home washers can’t handle the weight. The result is broken washer drums, bent shafts, and very expensive repair bills.

Here’s how to wash one safely at a laundromat.

Check your blanket’s weight and material

Look at the tag for two things:

Total weight (usually 15, 20, or 25 lb)
Filling type — glass beads, plastic poly pellets, or steel shot

Most weighted blankets are made of glass beads inside a quilted cotton or polyester shell. Some have a removable duvet cover.

If the blanket has a removable cover — just wash the cover separately like a duvet cover. The inner blanket only needs cleaning every 6–12 months.

If it’s all-in-one (cover sewn shut), follow the rest of this guide.

Pick the right washer

Weighted blankets are heavier than they look when wet:

15 lb blanket → 30 lb washer minimum ($6.25)
20 lb blanket → 35 lb washer ($6.50)
25 lb blanket → 45 lb washer ($7.75)

Never use a smaller washer. A wet 20 lb blanket weighs 30+ lbs. Stuffing that into a 20 lb home washer at home is how people destroy washers.

Pre-wash check

Before loading:

Check the seams. If any seams look frayed or are coming apart, don’t machine wash. Beads can leak out and damage the washer. Hand wash or repair the seam first.
Pre-treat any visible stains with a drop of dish soap. Don’t soak the whole blanket.
Make sure the blanket is fully spread out in the drum, not balled up.

The wash cycle

Cold water (always — heat damages the bead material and the cover)
Gentle/delicate cycle (less agitation = less stress on the seams)
Half a normal amount of detergent (any HE liquid is fine)
No fabric softener (coats the cover and reduces breathability)
Add an extra rinse if available

Total wash time: about 30–35 minutes.

Drying — slow and low

This is the harder part. Weighted blankets take a long time to dry, and the wrong heat will damage the filling.

The rules:

Low heat only. Medium or high will melt poly fillings and crack glass beads.
Plan for 60–90 minutes. Don’t try to rush it.
Pause every 20 minutes and shake the blanket out to redistribute the beads. They tend to settle to one side as the cover dries faster than the filling.
Don’t use dryer sheets with weighted blankets — the chemicals can react with the bead material in some brands.

If you’d rather air dry: lay the blanket flat across a folding table or a few chairs. Don’t hang a wet weighted blanket — the weight will stretch the seams permanently.

When NOT to machine wash

A few signs you should hand-wash or take it to a professional cleaner instead:

The cover is silk, satin, or has any “dry clean only” label
You see beads leaking through the seams
The blanket is over 25 lbs (rare but they exist) — too heavy for any of our washers
It’s a luxury cooling/cool-touch fabric — these often need special care

For everything else, our 35 lb or 45 lb washers handle weighted blankets without any issue.

How often to wash

Most people overestimate how often a weighted blanket needs washing. Once every 4–8 weeks is plenty for normal use, since you’re not in direct skin contact with it (you have sheets and pajamas in between).

If it’s a kid’s weighted blanket or one used during illness, wash sooner.

A quick reminder

If your weighted blanket cover is removable — always remove and wash the cover separately first. This is the right answer 90% of the time. The inner blanket itself only needs occasional cleaning.

→ See washer sizes → Or how to wash a comforter