We understand that mistakes happen. It’s possible to lose an Aligner – especially when they are clear! Maybe you left it in a napkin at the restaurant and it was thrown away… or maybe they were washed with the laundry. If this happens, make sure to call and consult your orthodontist for the best advice. If you are close to graduating to your next tray, simply put it in early. If not, make sure you put in the previous tray so that your teeth do not shift.