Can these be washed? "They don't need to be washed. But I had to soak one in warm water after a soda spilled in my bag and it took awhile to dry out but they work good as new now. If you're just using them on sunglasses and regular glasses then it will pick up the oils and makeup and specks of hairspray or water (or whatever it is that gets on them) and then it can be used over and over and it amazingly soaks in everything. I got these as stocking stuffers and everyone has raved and asked where I got them."