The only thing about taking things to clean your system is that it makes your system be too clean, which will raise red flags, and it changes the nitrate in your urine. Far as baking soda cleaning your system I doubt it , I know that baking soda will work for the digestive tract.marijuana will be out of your system in 30 days anyway.but as you know there are different types of drug tests that can detect use as far back as a year for some drugs.