I'm wondering if Heat and Bond has an expiration date. I bought a package of it awhile back and it hung around for awhile before I used it and I couldn't get it to stick. I finally just got my iron as hot as possible and at least got it to partially stick and sewed the loose parts first. Let the iron sit on it for a few seconds then remove it and let it cool off before checking to see if it stuck. Good luck. That is very frustrating, I know.