I clench my teeth using Clear Correct trainers. Can this be an issue?

It is common for patients to develop this habit of clenching when they first stare to wear the trays.  It should diminish over time, but try to make a conscious effort to keep your teeth apart when you notice you are doing it.  When you are done with treatment, you should invest in a night guard to protect your teeth.

Clenching will not affect the longevity of the trays. Many patients clench due not being comfortable with the trays. If you did not previously clench your teeth, this should go away. I would be more concerned with grinding of your teeth. If you are aggressive in your grinding it could wear a hole in your tray, making it less effective. Short answer, you should be fine.

Clenching is a common development when patients first start wearing clear aligners. It should diminish over time. There is a slight possibility that you might develop an open bite in the back molars, but this is corrected toward the end of treatment.