What will clean meth out of you system to pass a drug test?

A good detox program and time.

Like most drugs (except for marijuana), crystal meth takes only a few days to leave your system. Like, 3 or 4 days. Maybe a week if you're an extremely heavy, long-term user. A detox product shouldn't be necessary, since you really ought to be able to stop using meth for just a few days. If you can't stop using meth for just a few days, then you might want to start searching for drug rehab clinics instead of jobs.