So i noticed my bottom tray has cracked a bit. I noticed Adam on the msg board had the same prob. Im being a little more careful when taking them out now. Im glad to say my kankers have finally gone away! My teeth are hardly hurting but i can feel them moving a bit when i take out the trays. I still miss my tea i used to drink about 3 time a day! I have noticed the white marks from grinding but there not a huge deal.
And yuck the smell of them …i have read its not too yummy..thats the only bad part! lol