Hi There, I've made lots of BHO and have lots of left over coffee filters laying around as well as some razors and some parchment paper that im too lazy to scrape clean. Wondering if anyone can help with how to go about making ISO hash from these? Do i need to freeze everything? my thought was no since we are talking about already extracted oil here. please help. what i am ready to do is just take all the stuff throw it in a mason jar, dump the ISO over it, and shake for 30 seconds and run it through a coffee filter into a pyrex dish then let it air dry till all ISO is gone. Got the right idea?