Well, I’ve had a few friends who have had to do this. Some of them swear by vinegar. Usually like half a bottle the day or so before. Also take some niacin, you can find it in most groceries or drug stores. It basically artificially enhances the speed of your metabolism. Saunas and sweating in general are a good idea too. As for less natural ways, the solutions they sell in head shops are usually p reliable, I’ve known more than a few people who smoke a lot everyday who have pbumed tests with that. If they don’t watch you ****, you can get a friends ****, but most places will have someone staring at your male reproductive organ.