When I get a new bundle of scraps, I put them in a large lingerie bag and throw them in the dryer along with a wet washcloth (or two, depending on how many scraps there are) that was dampened w/ water and a little bit of fabric softener then set the dryer on high. All at once, the wrinkles are gone, any odors are removed, and any little "visitors" are killed by heat. Just removed from the dryer and smooth out the pieces while still warm.