Bore a hole in the inner cover near one edge and place some bottlecaps or pebbles on it to provide some space for air movement. Inner covers are usually cut to fit a bee escape in an oval hole-I have never used a bee escape. Putting the hole near one edge lets you use a baggie feeder without covering the hole. An inch or so is fine. Instead of bottlecaps you can leave the entrance reducer between the covers. I usually put it near the front so water runs off the top at the back.