Yes.. there are two stickied threads at the top of the drug testing forum.

One is the substitution method.. Where you get fake urine or urine from a clean friend and substitute it during your test.. This is recommended for people who have no way in hell of passing their UA.

The other method is the dilution method.. This is recommended for people who either cannot substitute no matter what, or for those who have abstained for awhile but could possibly still test dirty. In your case if you come up dirty on your home test and cannot substitute you should use the dilution method. It does not help you clean your system out faster but it essentially waters down your sample so there is less of a concentration of THC metabolites in your urine which would (hopefully) put you below the cutoff point for detection.