Isopropyl Alcohol

Has anyone ever done this before? A guy that I know is having problems with water in his gas tank and he said that he put a couple of 1 pint bottles of 70% by volume Isopropyl rubbing alcohol in his gas tank in hopes to eliminate the water. I know dry gas has some amount of Isopropyl in it but I dont think I would do what he did. Well to this day and it has been about 2 weeks and 1 1/2 tanks of fuel later he still claims to have water in his tank. Just thought I'd ask if anyone has ever did this and if so does it work...Well anyways he said his exhaust does smell good, sort of like cam 2....