clean what? using marijuana is decisional so just make a decision not to use it. if you are talking about getting a clean drug test it would depend on many factors. the sensitivity and type of test used by the lab and what you consider as a "light" user. and how fast your body clears cannabis from your system. it is possible that some lab tests like hair will detect thc at 23 days.
can a light marijuana user get clean in 23 days?