I bought this very expensive non stick petits four mold set, which I planned to use to make truffles. Unfortunately, non stick or no non stick, there is no way in hell I will ever be able to unmold the chocolate filling from these things. As I said, they were very expensive, and I feel like I've thrown my money way. What is the point if it's literally impossible to unmold? Anyone have any ideas on how to solve this problem, because I'm out of ideas