Also, when I square up blocks and have all those little bitty strips of fabric, I put them in a ziplock baggie and throw out in the back of the yard for the birds to use in their nests. If I have a strip about an 1" wide, I run my rotary cutter up & down it several times and "whiddle" it down to tiny strips.
A couple of years ago, one of my grandsons found a nest with some threads in it. So cool!!