Be sure to redo it! A friend of mine accidentally dropped the transparent maintainer in the cup. He thinks it doesn't matter if there is only a little rebound, but now it's back to its original state! Unfortunately, you must contact the dentist as soon as possible. If there is only a slight rebound, the doctor will give you an appliance with only one steel wire, which can be removed. If it's serious, you have to do it again. Even if you do it again, it will save time.