Hello, I have to wear a trainer for straightening teeth, I have worn it before, but only during the day. Now I have to wear it at night, but the trainer is the type of upper and lower jaw together and when I lie down with it and try to sleep it falls because the mouth relaxes and there is no pressure. Does anyone know how to deal with this and can you think of something to sleep with, because the situation is complicated and I really need to wear it at night. Thanks in advance!