Irregular outcomes often come from unequal gel application; use well-fitted trays and prevent overfilling to prevent streaks

https://blogfreely.net/dernesvhbz/whitening-for-sensitive-teeth-how-we-lessen-discomfort

Patchy outcomes often originate from uneven gel application; use well-fitted trays and avoid overfilling to avoid streaks, gum inflammation, and lost product.