Patchy results often come from irregular gel application; use well-fitted trays and avoid overfilling to avoid streaks

https://archeristf570.wpsuo.com/hydrogen-peroxide-vs-carbamide-peroxide-understanding-the-distinction

Patchy results typically come from unequal gel application; use well-fitted trays and prevent overfilling to avoid streaks, gum inflammation, and squandered item.