My were removed 6 weeks ago and I received clear plastic retainers for the top and bottom. I have been taking good care of it. I clean it regularly and I always make sure it is in the case if I am not using it. However for no apparent reason, it is already breaking. Little pieces of the plastic are wearing away and breaking off piece by piece. It is getting little cracks in it. What is going on? I was wondering if there is a way I can do to avoid this from happening again. I am planning to go the and get a new retainer.
Thanks so much in advance!