When I clean my PAX I soak the mouth piece and screen in 70% ISO. I then rub ISO with a Q tip on everything until clean. I will then wait at least 30 minutes and heat up the pax a few times to burn off any remaining ISO and any small cotton fibers that the pipe cleaner and Q tip left behind...After 30 minutes of heating and cooling off, I blow any remaining crap out. After letting it dry, I get this sweet taste and I think I am tasting ISO...is that possible? I thought ISO, even at 70%, would evaporate in minutes...Or does it take longer? Maybe a clean pax just tastes weird? *is inhaling this tiny amount of residual ISO bad?