Hehe, I don't think mine would do it either. When we got hired at UHC, they required a urine drug test. He got so "performance shy" in the bathroom at the lab that he couldn't go - we had to go to McD's and get a super sized soda. 3 hours later he still couldn't go
Maybe you can get DH to take the cranberry tabs too? They're supposed to help lower the pH of his swimmers.
Oh and you can try to follow the diet as much as possible, at least avoiding lots of salt, no caffeine, eat tons of dairy, etc.
