I am happy to see that both of my hives have survived the harsh Wisconsin winter, so far. A recent hive inspection showed me a build up of moisture in the upper super. I created a small gap above the inner cover to help ventilation and wanted to open up the wooden entrance reducer to help the cause as well. The entrance reducer was stuck in place (frozen, propolised shut, or due to weight of boxes above) and I was unable to remove it. It is too cold to lift the boxes in order to remove it, do you know of any tricks?