Proper oral hygiene is essential during Invisalign treatment to maintain healthy teeth and ensure the effectiveness of the aligners. It is important to brush your teeth thoroughly after each meal or snack before putting your aligners back in. Use a soft-bristled toothbrush and non-abrasive toothpaste to clean your teeth and gums gently. Flossing is also crucial to remove food particles and plaque from between your teeth. Additionally, clean your aligners daily using a gentle cleanser recommended by your dentist.