My Winston was a prolific bar biter. He would do it all night. I've tried bitter spray, vinegar, etc and he continued to do so, which worried me because he was able to leave teeth marks. I then switched his grids from the old ones to the new powder coated grids. He tried several times to chew at night, however he could not make a mark on these grids! He tried more, but has since given up as he cannot chew down to the metal. Because of these new grids, Winston no longer bar bites. I can now sleep at night (he is in room).
Myself, Winston & his teeth thank you for these grids 😀