Last week after detailing 5 vehicles in 3 days (in the sun), I developed the most excruciating thigh cramp on the third day. Each day when I returned home I would weigh myself before showering and would lose 5-6 lbs. I thought I was properly hydrating as I had water, soda and watermelon. I read through several post about "staying hydrated" but can't seem to find what works best. I talked with a friend who is a nurse and she told me soda was the worst while out in the sun working and that Gatorade and Powerade were best. Any other remedies?