Just a quick question. Following directions, they say to put you back to the sun. When I do this as apposed to facing the sun, I get about 5 points difference. Should I block sun out or I'm I being to silly about it? Thanks Bill
We dont do "5s" here. The best way to get results is the 10's method. Start at the 30, then the 40, then the 50 etc. Only look at the tube after filling to a 10, it makes much more consistant results.
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