I finally tried a cleaning suggestion that I’ve heard a dozen times and it works. Put a bowl of water with a cut up lemon in the microwave, set it for 5 minutes and then clean. It really did make cleaning easy. The microwave was a bit gross so it took more than one steaming. When the water got low I had the bright idea to add vinegar instead of water…it worked about the same except that when I opened the door of the microwave and the steam came rushing out I got a sinus cleansing.
Hindsight, it probably wasn’t one of my better ideas but trying the lemon water worked great.