i got drug tested every month for 2 years. It sucked, but now my parents are so desensitived to the whole weed scene i can be as up front about it as possible. dont start buying detox shit its expensive and goes to a bad cause. If i were you i would remind them how much they are going to have to pay for drug test kits (about $20 per test) and laugh because they are wasting their money on something that isn't a problem. Tell them to educate themselves on the issue (both sides - positive and negative) before they make any ignorant decisions. good luck. Besides, if they do decide to test you for a while and you stay clean, you'll have a much higher appreciation for our lady mj when you get to toke again.