These kits use highly concentrated whitening gels. Usually, these gels include hydrogen peroxide or carbamide peroxide, though you can find some with gentler ingredients. While there are countless ...

Carbamide peroxide 6.5%; otic soln. 5–10 drops into ear. Keep drops in ear several minutes. Use twice daily for up to 4 days if needed. May irrigate with warm water. Avoid eyes. Reevaluate if ...