About 10 years ago I used white vinegar to pass a drug test and it worked. This was obviously a variation on dilution as many of the same rules applied, exercise and lots of water. I also knew some very heavy drug users that were successful as well, and they used many drugs not just MJ. I recently failed a test using vinegar, and a detox drink. Any idea what went wrong? I am now 45, a daily user about 180 lbs and 6 foot tall. My consumption has remained constant at about one joint a day since I was a teen. I have a retest and plan to try substitution this time but am going to go through the dilution process, just in case! Thanks Guys, this is a great service and has been a ton of help already, I wish I had found you earlier!