Well, right now during my Mighty RMA I'm kinda forced to use my old EQ4 and somehow I don't clearly remember how to properly use it as I don't get near that much vape like from the mighty... But I know that it can be a beast too. No worries I'm cleaning my mighty in 99% ISO for exactly a year now, sometimes I let the cooking unit soak for a couple of hours. Oh man seriously that is in fact the problem?! Don't know how many small o rings I've destroyed with my cooling unit, I always thought this was normal and kind of a bad design decision... Hell yeah! The resin inside of the cooling unit lets the mighty produce steam for a super long time. Sometimes I can vape for about 45 minutes in just one session because of that. I also like to evaporate my ISO and scrap off the oil/resin afterwards, which is very intense!