When scraping the Pyrex, the outer edge was cooler then the center and had crystalized. So when I scraped it all together the crystaline and precrystaline shatter mixed together to make this which I thought looked like a Pay Day candy bar, you know the one with the carmel and the peanuts. You can only imagen what the smell and taste is like when you get every bit of butane out this is the best extraction method I try so far . It is a bit more dangerous than my other way but as long as you stay out side with a fan going Its well worth the risk but be very very careful.You can BLOW UP. I used 5 ozs of Jack Herer and Da Super Lemon Haze mixed trim. So the buzz is way way up Kinda like coming on to schrooms, a little psycodellic and you want to do something any thing,big smile ,good time,awsum. TOAST