Just spray the light, great tasting foam into a dental tray or retainer (including Invisalign Retainers), wear it while you do something else, and have whiter teeth in minutes!
Read about my experience with Alightener Foam and also follow my Invisalign braces adventure this year! I'll definitely be using Alightener Foam to keep my smile bright and also the Alightener Retainer Cleaner!