Please follow the instructions provided in your Helix kit on how to use the saliva collection tube. It’s as easy as 1-2-3: 1. Register your kit at Helix.com 2. Do not eat, drink, smoke, chew gum, brush your teeth or use mouthwash for at least 30 minutes prior to providing your sample. 2. Think of lemons! It helps get the flow of saliva going.