Hey guys on here as my last resort. Long story short ive got a robbinair 15500 2 stage pump and i have a pro vac chamber. Im using a hot plate for heat source and am running commerical b grade nugs . Im using a glass extractor and running about 10gs using unbleached coffee filters for filteration. I am spraying directly into pyrex then scraping onto oil slick after initial heat purge, then goes stright into the vac. I have tried purging @ 140deg and 100deg. Now that I explained my setup let me tell you the problem I am expericing. Afer i intitally scrape and start purging and the muffin breaks, the oil looks super clear and perfect. After it stops reacting after an hr or so i flip and keep vaccing untill i see it not reacting then i flip agian. What im being left with after about 3-4 hours of vac purge is shatter like bho that is clear and clean yet somehow has some cloudiness in certian areas of the slab. its almost milky but its no present all the way throught the slab. It seems like something has gotten into my oil, because in the initial purge after muffin breaks it looks perfectly clean and clear. My question is why does this cloudyness happen ? What is it ? Why does my oil look amazing after 1 hr purge but start looking contaminated and shitty after 4-5 hours ? I think I also noticed that if i did a test dab after the 1 hr purge. the nail would turn black but there would be no debries. However after the 4-5 hr purges there would b some sort of debris left on the nail. Isnt that weird ? Agian i like to stay away from the fourums but i really need some help guys. Any info is greatly appricated. I will try and get pics soon.