Burr comb beneath inner cover with feeder rim. (April 2012, St. John’s, Newfoundland.)
Feeding rims — rims or shims that are used to make room for sugar bricks in the winter — will eventually get filled with burr comb as the spring population expands and the weather warms up. So it’s good to remove the rims before that happens. Here’s a 5-minute video that shows how I did that with one hive this year. It’s followed by a 15-minute deeper dive for anyone with a longer attention span.