There is a sticky for dillution that will help if you want to go that way but it really depends how dirty you are whether dillution is going to work. I would try a trial run with dillution and test yourself to see if its working a couple days before the UA. If it shows clean then if you follow the dillution sticky the morning of the test you'll probably have a real good chance at passing. If you absolutely have to pass then synthetic urine is the way to go. All you have to do is keep the temp right which is easy to do.