Do you have a saliva test coming up? The best product for that, if you don't have the time for a full detox, is the Toxin Rid Mouthwash. It is perfect for those times when you need quick help. Make sure you are clean for at least 12 to 24 hours before you use this product. You test after 30 minutes, and the Mouthwash will last up to 4 hours.