I cleaned out in 2 weeks, but who knows, it could have been shorter cause that was only when I was tested. I drank 1 gallon a day and then a few days before I drank 2 to 3 gallons. I cant say you would be clean, but I can say that drinking lots of water cleans you out. I drank a gallon of water in 2 hours before I pissed, so make sure you drink a lot before you go and hopefully if nothing else you will be diluted. Good luck and hope goes well.