If you are concerned about a mouth swab drug test for Amazon, there are a few things you can do to minimize the chances of testing positive for drugs:
Stop using any drugs immediately: Depending on the substance, it can take several days or even weeks to clear your system.
Stay hydrated: Drinking plenty of water can help flush toxins out of your system.
Avoid smoking or being around smokers: Second-hand smoke can sometimes trigger a positive result on a mouth swab drug test.
Use a detox mouthwash: There are products on the market that claim to help remove traces of drugs from your saliva