If you only took two nice bong hits and you have a high metabolism I would think that if you only drank water for the next 3 or 4 days that you system would be clean in that time frame 3-4 days. I have used the XXXClean drink once. It did work that time. But I did not smoke for about 7 days before I had to take the test. Heard that golden root seal from GNC will help too. Take about 4 per day. Good Luck!!