With Invisalign you can brush and floss your teeth the same way you did before. It is still important to brush twice a day and floss once a day to prevent plaque build up and cavities. Of course you remove your aligners to brush and floss. You should also brush your aligners with your toothbrush and toothpaste to keep them clean. The only difference is that you may want to consider brushing your teeth after you eat something and before you put your aligners back in. You don’t want to trap food particles underneath your aligners and then wear them for hours. This could cause tooth decay.