hehe.. i tend to chew as well.. 
those little tabs inside the regular mouth pieces have usually disappeared in a month when i used those.. haha then you have to bite down on one side of the mouthpiece to keep it in the mouth. gets old after a while

those little tabs inside the regular mouth pieces have usually disappeared in a month when i used those.. haha then you have to bite down on one side of the mouthpiece to keep it in the mouth. gets old after a while
