Hi,
I have been trying to use modeling paste for cream, and when I first pipe it it looks amazing, but after about 5 or 10 minutes it sort of melts and loses it's shape. How can I make it firmer? Also, I live in France and we don't have a lot of the brands I have seen recommended (or at least I can't find them). I am using a brand called Pébéo. Help pleeeease !!