When I use the fan it says to clean and/or replace the filter. I have cleaned the large filter at the bottom of the microwave, but I continue to get the same message. Is there another filter or do I need to reset something? This is a new microwave and I'm not sure how to work with it yet. Do you have any kind of manual, I don't seem to have one. Gail Hoover ghoover2008@comcast.net