most of the home tests that run about 15-30 bucks are not that different than
the ones the employers use for pre-screening applicants..(fucking commies)
however, if mom is paying attention she will notice the color. it all depends on how much you smoke. if you only smoke once or twice a week than you should be able to clean up in a week or two, if you smoke daily for say...oh maybe 30 years...you will need at least 4 weeks to clean out...the other key factor is body fat since that is where the thc is stored...the fatter you are, the longer it takes to clean out.