ya so its my 1st time doing this. i have lots of trim and 3 32oz bottles of 91% isopropyl alcohol. i know 99% is better but my local wal-greens don't have it. but any way, how long do i let my iso sit with my trim for? i read 30 seconds is ideal. im going to chill my iso before hand, but should i chill my trim? its dry... and i plan on using the fan to help evaporation. any tips or pointers are recommended.