I cut them into rectangles and use them as dry dusting cloths for my Swiffer to give the floor a quick sweep. They pick up so much thread, dust and pet hair it's almost unbelievable.
Smaller pieces are great for dusting TV's and electronics. Won't scratch like a paper towel possibly could.
I also use small pieces of batting to make easy quilted cosmetic bags when getting ready to sell things at craft fairs.