Indoor antenna question

I have both a Mohu Leaf and a Winegard indoor antennas. Both get good reception most of the time. Sometimes they will cut out and the screen goes black for a couple of seconds. Is there any tips or tricks to try and eliminate or reduce this type behavior?

Also I struggle to get Fox OTA. I have attached TVFool. Should I be able to get it?

http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3de2cb5924c0a59b