Maintenance matters: use a straw for dark drinks, rinse after meals
https://privatebin.net/?30d761adba1dbeda#9kbCyze3nfJ7oenxQy3sKsRpYbqYPeeYtD7EfhwLqDqN
Upkeep matters: use a straw for dark beverages, rinse after meals, and schedule regular cleanings to protect your whitening results longer.