Patchy results frequently originate from unequal gel application; use well-fitted trays and avoid overfilling to prevent streaks

https://codydjku752.trexgame.net/is-teeth-whitening-safe-professional-safety-tips-and-guidelines

Patchy outcomes often originate from irregular gel application; use well-fitted trays and prevent overfilling to prevent streaks, gum irritation, and wasted item.