How To Pass Saliva Test

So, I decided to post this after hours and hours of research on this and really no help. So, my fiance went to a job interview and they asked him to come back the next day for orientation and at this orientation he will be given a mouth swab. Well, needless to say this was pretty short notice and we are heavy smokers. Anywhere from 2 to 3 and a half grams daily between the 2 of us. Long story short we were just going to get this stuff called "High Voltage Detox Mouthwash" from our local head shop because I knew he could smoke up to the day of and pass because I have used it before with great results, but they were out as well as all the surrounding head shops (must have been the time for drug tests i guess). So, I started freaking out. I went to the dollar store and bought a bottle of off brand mouthwash for a dollar and a pack of listerine breath strips and a pack of breath mints. He brushed his teeth 3 times before his test, paying close attention to his cheeks and gums, and on the way to the place he rinsed his mouth with the mouthwash and ate 2 breath strips and a mint. When we got there he did this process over again. He passed the drug test with flying colors. By the way he didn't smoke the day of the drug test either. He smoked the night before but not the day of. Hope this helps someone and also saves money because that detox shit is expensive.