I was very concerned about this when i was doing the washes also, but in the end the results spoke for themselves. the return remained the same. yep i did that for my abv too. cookie sheet in the oven at the lowest setting. 5 min in, pull out turn and let it sit out 5-10 min. then repeat until dry. your house might smell like abv for a lil bit lol the key for doing a QW is to get it out of solution quickly. the bag won't help you here. the best way is to use a double straining technique. get a cup with a funnel and your coffee filter ready. then also use a big bowl/dish and a pasta strainer to strain your abv quickly. then dump that solution into the coffee filter setup and purge (I recommend a hot water bath, using an electric frying pan outside) iso boils at: 82.5° C (180.5° F) so you don't really need to go hotter than that unless you have water in your solution too. but it will also evap given time!