I know two gals who use Duro which can be found at Wal-Mart and paint stores. They also use Goo Gone for clean up.
I am so glad you have had similar results that I have had. Also, "goo gone" will take the glue right off your forms or skin in a hurry. Also if you use a heavier spraying of the forms(I coat them twice), they will stay on longer. Also, I use fairly large forms, size 8 which is like a large C or a small D and they stay on just fine, even with no bra. I wear mine 24/7 and never have I got a rash. Like I said, Ironically my medical patches irritate my skin after just three days and those are supposed to be medical adhesive.
I wouldn't recommend it for expensive forms, but forms like the Amazing Adhesive Bra, available at Walmart, which can be reattached up to 50 times, and are inexpensive, would be ideal.