You can also find a product that is just like the body glide made by monistat in the women's area of the drug store. I have used this for my nephew who is a little overweight. He started to chaf at his thighs the first day we were at WDW.
I went to Walgreens and bought the stuff by monistat and used it on his thighs and he never had another problem. I can't think of the name of it right now, but it is a clear lotion that feels like silk when you rub it on the skin.
If you can't find bodyglide this stuff works just as good and is easier to find.
It is expensive though, I seem to recall that a 4 oz tube was over $10. Peggie