I cut a notch in my bucket and lid, too, for my deicer. Then when winter ended, I realized I could turn my lid around the other way to block the hole. I forgot all about making an air inlet to avoid a vacuum building up, but I guess my notch serves that purpose. Even when blocked, it isn't really a tight seal.I have a "v" cut out for my deicer in winter so I keep a board and a construction cone on top of mine.No dust, no poop.![]()