Irregular outcomes often come from unequal gel application; use well-fitted trays and avoid overfilling to avoid streaks
https://blogfreely.net/dernesvhbz/can-you-whiten-teeth-with-braces-a-guide-to-timing
Irregular outcomes often originate from uneven gel application; usage well-fitted trays and avoid overfilling to avoid streaks, gum irritation, and squandered product.