i make bubblehash and to get it into hard nuggets all i do is hand-press a glob into a cube, marble and whatever shapes while it's still wet. i press it when it comes out of the bag and drain until water stops running then shaped by firm squeezing then once dry it's very hard. i have never heard of using heat like that to make hash and would be very concerned the potency would be greatly reduced (along with it still won't be what you're looking for).