probably the best thing you can do is go to growweedeasy.coom on the canna butter. read up on decarboxylation. also dont over cook the butter/oil! if you cook it for too long it can be a dud and not very potent.

I would say to cook the trim and oil/butter (and i recommend coconut oil) for 250 degrees for no more than 30 minutes.

as i said there is alot of important information on growweedeasy.com. dont cook it for 4 hours in a crockpot! it will suck

peace