Can mouthwash kill the weed in your saliva?

Mouthwash may help reduce the number of bacteria and some pathogens in your mouth, but it is not effective at killing all types of microorganisms, including those related to weed or THC in your saliva. While it can mask the odor and freshen breath, it won't eliminate the compounds associated with cannabis use. Additionally, any trace of THC in saliva can typically be detected by drug tests, regardless of mouthwash use.