Does black tea clean marijuana out my system?

I don't think that the black tea will help. There is a good article http://www.ncsm.nl/english/thc-weed-detox how to remove THC from the body, maybe this will be helpfull for you. I smoked marijuana once in college. I was lucky that we didn't pass the drug test before the competition. We had girls who often smoked marijuana, but they always passed a drug test. I don't know what they did, but you can search the information on the Internet.

Drink enough of anything and you'll clean a lot of things out of your system.

You can even clean out the things your body needs. This usually means you've brought on water intoxication.

Unfortunately, the tests you see the lab do are preliminary. They check things like trace minerals, proteins, foreign substances, the presence of blood cells. They;'re usually pretty thorough and will know if you've tried to flush anything out of your system.