I think you mean 70% ethanol, aka ethyl alcohol? AFAIK it's used as a disinfectant - and unless it is "de-natured" (denatured), it IS drinking alcohol (140 proof grain alcohol) and would have an excise tax on it - so it probably has a denaturing agent added. Pure ethanol is extremely hygroscopic - it will suck water right out of the air if left open. There are special dehumidifiers that use that principle, IIRC. Edit: dis-remembered the alcohols - it's triethylene glycol - see http://tinyurl.com/5s6sf end edit

HTH,

Tom