How To Deeply Clean Your Retainer. If your retainer has caused any cuts in your mouth or sore spots, you can rinse with warm salt water. Try smoothies, yogurt, ice cream, or applesauce.
“clear orthodontic aligners and retainers collect germs and bacteria while in or out of your mouth. Rinse the retainer well with warm water. An antiseptic mouthwash also helps ease the pain and heal the area.
For retainers and mouth guards, add 4 pumps of mouthwash to 4 oz of water and soak overnight.
Rinse the retainer well with warm water. The faq page on invisalign.com states (06/22/2019): This is especially effective if your retainer smells foul. This should properly position the floss so you have one end outside your mouth and one end inside.