I took my design-wall flannel bed sheet and washed it. Only about half of the treads came off. I had sprayed the wall with adhesive so my squares would stick to it. So everything did. Now I will try some of the other methods. I have a lint roller that can be washed and reused. That feature is very nice, but I'll have to see how it works on threads that have been stuck on with spray adhesive. Even after it has been through the wash!