The detox is not 100% and I imagine they don't really "guarantee" it 100% with a full refund.If you can't find any quickfix then I would go with what you're doing now.Do the normal dillution and I would be reasonably sure you're going to pass. I think the money for the detox kit would just be pissed away(pardon the pun) because it basically wants you to do the same thing you are going to do anyway. Whick drink some fluids in the morning,piss a few times and take your midstream piss, so you would never know whether the detox worked or whether it was the dillution that worked.

A word to the wise. Be prepared next time.And there more than likely will be, and pick your self up some synthetic urine.