Excerpts from a thread in S.E.R. ng wrt microwaving..
I've found certain techniques that produce results which are more to my personal liking.. such as always wrap/cover a sandwich in paper towel to heat (prevents the bread/bun from getting hard spots without becoming soggy), cover cold pizza also with paper towel, or better yet, eat it cold. There are various options.. placing flat foods between two paper plates, or tall sandwiches between two paper bowls. There are various commercial plastic products/accessories for MWO use, but those require washing.. disposable paper (not plastic/styrofoam) plates and bowls, and plastic utensils don't.
I never put uncovered liquids or other types of foods that are a combination of food/liquid in the MWO, I always use a paper plate as a cover. I can't stand seeing a dirty MWO, and it's far easier to prevent eruptions than to clean them up. But then, I generally always wipe the interior down with a paper towel dampened with 60/40% water/alcohol mixture that has a few drops of liquid soap added per pint, to wipe out the condensed moisture, every time I use the MWO.
I've been wanting to modify my MWO's fan to run for a timed cycle after the food is cooked and removed, which would exaust some of the condensed interior moisture and odor/aroma from the interior, but to also to help cool down stuff that's way too hot to eat after 12 minutes of cooking, such as the big Marie Callendar(?) potpies.