Isopropyl Alcohol

The alcohol will absorb the water and blend with the gas. That's what Heat and Iso-Heat do. Iso-Heat should be a higher concentration of alcohol than the rubbing alcohol. The stuff he threw in is 70% alcohol, and 30% mostly water. There are also some additives to the rubbing alcohol that will give someone horrendous diarrhea if they drink it. They assume that if someone does it once, they won't do it again.

Have your friend try Iso-Heat. The rubbing alcohol he added may have already absorbed close to its limit of water, and can't help him out.