Wearing clear aligners to straighten your teeth is a worthwhile option because of their flexibility and discreet appearance. However, they do require a higher level of responsibility than traditional metal braces. Failing to abide by the guidelines provided to you by your orthodontist can result in a delay, which means your teeth may not be moving as they should. If this seems to be your problem, here are 3 reasons your smile may not be on the right track.