I’ve been having some issues with reheating my M&P soap when they become too think waiting for a layer to harden. I’m using the microwave but should I instead use a double boiler? For some reason when i have to reheat the soap it turns into hardened glue unless I really nuke it which I’m sure isn’t a good thing to do. Anybody have tips to keep my M&P liquid when working with layers as it cools? Thanks!