I post filter the distilled water with a .02 silver impregnated ceramic, carbon filter. This is to get any wierd VOC's or other petrollium products that vaporize at light temps. I add micro ammounts of himmalayn sea salt to re mineralize the distilled water after post distillation filtration. I have been doing flouride free water one way or another since 2005. I am smarter, faster, more energetic, less zombified and healthier since then. Less hangover as well.