So lately after sitting for a few days my BHO turns from a nice clear sap to an opaque butter. This has happened to my last 3 runs. IT takes about 3-5 days to turn. I have been making the BHO the same way for about a year although I have been making BHO for 15+ years. Most of them using a plastic pop bottle?!?!?! Now I use a glass tube, run 1.5-2 cans through 35-40 grams of quality trim & popcorn bud, blast in to a pirex dish floating in hot water and let most of the butane evap before a high heat purge (-200) on a hot plate. I know that a lot of people would not do a high heat purge but I have seen it done and done it my self many times with very good results. There is a good video on you tube showing the process over a 12 hour period. My first 10-15 runs using this method produced some of the best sap/shatter and I was really enjoying it until now. The only variable I can find that has changed is the out side temp. I run out side for obvious reasons. I cant think of a logical reason that would cause this result. I'm stumped. I imagine there is a small amount of residual butane left but I figure it was there in my past runs too and they never did this. Any thoughts??