I never use the microwave. DP and teenage DCs use it regularly.
When cleaning the kitchen I, usually, just wipe around the outside of the microwave as I assumed inside was being cleaned after each use.
Today I opened it. OMFG!! Disgusting doesn't cover it. Turntable, door, roof, all walls were CAKED in food. Not the odd spatter, full on encased. My oven is cleaner and it hasn't been cleaned for 3 months.
I fully lost it and threw it out in the garden for the scrapman.
DP says I'm being ridiculous. I think, if they can't wipe over the thing after use, they don't deserve to have it.