Product review (1 stars): Melted
These extenders looked nice and they cleaned well on their surface; but, when I recently tried to remove them to clean under the extender, they had melted into the oven.  I was able to use a knife to pry most of the melted product off of my oven, but residue remains.  If you install them and never remove them, I guess they are ok.  Not for me, though.