Product review (2 stars): Not really much material to support thorough cleaning. 2.5 stars.
I had to put some charcoal filter material in here and super glue it. Problem solved. I can't rate this any higher than 2.5 stars and that is just for being fairly cheap. What you get in here surely does not clean much at all. You will need to find a solution if you are replacing this on an oven that is used often.