NORSKI MOULD RELEASE WAX
Mould release wax is the answer for getting your products out of the mould, this is what the professionals use.

Based on the same principle as waxing your vehicle, however, this product is applied with a clean cloth then wiped off with another clean cloth. This process needs to be repeated up to 5 times leaving an absolutely microscopically thin layer of wax on your mould which will enable you to get the trickiest of shapes out of your mould.