I bought a single heating blanket and it was fabulous. So I bought a larger one when I needed that. Big mistake! It stank. It outgassed. I left it outside for a couple of days. Not helpful. A couple of nights. Nope. I washed it. Still stank. Again. Not good enough to get near. Finally the ultimate concoction: Dawn, Borax, vinegar and some HP detergent. Left it soaking. Then two rinses in the machine and one in the tub. Now it's OK, but I should not have had to go through this to get rid of the chemicals in this product.