Thank you QM for being a fellow Project Linus blanketeer. I too have fun stash busting quilts. However, I do not use dryer sheets as foundations any more after learning that all fabric sheets contain an oil base. I have industrial allergies and had a terrible time when I pressed the blocks made with fabric sheets--no wonder. They left a stain on my ironing board too. The residue also turned into a spot on lighter colored fabrics within the blocks that I used with dryer sheets. Presently, I use the cheapest, lightest weight junk fabric I can find and cut that up for my foundation. Then I use my better fabrics on top for strip or scrappy piecing. As for fire safety, well, that is another reason I do not use the used fabric sheets. Happy stitching everyone.