Patchy results frequently originate from uneven gel application; usage well-fitted trays and avoid overfilling to avoid streaks

https://manuellinq708.huicopper.com/post-invisalign-whitening-finishing-your-smile-transformation

Irregular results typically originate from unequal gel application; use well-fitted trays and avoid overfilling to prevent streaks, gum inflammation, and squandered product.