Please refrain from consuming food (including chewing gum), smoking, brushing your teeth, or using mouthwash before 1 hour of sampling (It is okay to drink water).
Before taking the sample, rinse your mouth with water to make sure there is no foreign material.
Please make sure your sample is collected to the marked line on the bottle.
Please complete the sampling within 30 minutes. If it takes longer, it can affect the accuracy of the results.
Please make sure your sample is properly sealed after collecting it.