I use unscented Curel lotion followed by anti-perspirant (I use Degree, but I don't think it matters). The gal who waxes me was amazed how few ingrown hairs I had after starting the regiment (I was a mine-field before), since she had recommended that I put nothing there and keep it really dry. I also found since I started doing this every day, when it was time for my waxes, the hair pulled out easier.
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