Imoo I think if you take the longer part of the carto cover aka~ condom and fill it with 91% ISO alcohol and top it the carto off with more iso ...move it through up and down... it almost works as a power washer. Blow out the majority and use a blow dryer you'll be good to go in a coupla of hours. ....ISO alcohol dissipates quickly ...kinda like that corozon(?) guys method. It works for me and if I use a dropper I don't have to use to much ISO(soaking in a bowl etc). I'm also a cheap ........ I ALWAYS USE THIS METHOD WITH MY ATTYS AND I CAN LITERALLY VAPE IMMEDIATELY AFTER CLEANING ....TRY IT.....city or burb WATER LEAVES particulates and doesnt dissolve the gunk *fast* like ISO.... I use 91% because 70% takes to long to evaporate imoo....so I'm also an impatient, cheap ........ I'm talking about 510 ATTYS and cartos no experience with anything else. I've been using the same original equipment since I started mid sept ...not a vet, newby here to ...... but it works really well. Does anyone else use this ISO condom method? if not ....... I should make a post of it.