Poison Ivy in the winter

Could be pure conicidence but I read that the rubbing alcohol nuetrlizes the oil and that you have roughly six hours to wash it off, Since I read that I started using the alcohol and have been less careful working around it and I havent gotten more than a bubble or two. Two years ago before I read that I was being careful knowing it was in the area and ended up at the doctors with my arms covered from my shoulder down and my eyes swelled shut