Wear your aligners about 22 hours a day and take them out only to eat or to drink anything other than water. Brush your teeth before putting them back in, so no food gets trapped underneath.
Clean them with cold water and a soft brush: hot water warps them. When they are not in your mouth, always keep them in their case, never in a napkin.
Change your aligners according to the schedule your dentist has given you.
