How do you recommend warming the Chavant to make it easier to work with? My house is quite cool and it's very stiff at room temp. It also doesn't seem to warm up too well just in my hands, but they're also cold! Is it safe to microwave? Should I warm small chunks at a time and repeat as necessary? I also have a heat gun, but am not sure if I should just aim it at one end of the block or take off a chunk and warm in a bowl or something. Any advice would be appreciated! Loving the content so far, and thanks in advance!