I've thought about ethanol because of the dual use as a disinfectant (I'm don't drink so the nightcap aspect doesn't interest me). Methanol is quite toxic I understand so you don't want to get it in a wound I wouldn't think. Interestingly Isopropyl alcohol, which is often sold for medical purposes, is also toxic but less so apparently. But it makes a lousy fuel because of incomplete combustion. Ethanol does burn cleanly and (and hotter than methanol I understand).