What is the best ratio and of what to make a good pitch that I can use to haft knapped points to shafts with that will not become soft in the heat. I have some that someone sent me, and my arrows in the truck the other day, but it was rather warm, was sticking together and was very very soft. Is there a good mixture out there that someone has tried for the heat. We hunt here in Va. in Sept and Oct. and it can get rather warm. Any suggestion would be great. And I know lots of people use a "hardwood" charcoal, but can you use cooking charcoal as well if it is ground up? Or maybe evern the charcoal dust from a cookout?