I had this happen with my top dishwasher rack. The guests squeezed too many dishes in it, and it broke. It was complicated to get it fixed, because it broke both the rack and the railing that the rack fit into. I’m just absorbing it as “normal wear and tear”, although it really isn’t, since the dishwasher is only a year old. It was obviously guest abuse. Sometimes I just don’t want to get into a hassle with the guests saying it “just broke on its own”, and then getting Airbnb involved, who in my experience is likely to side with the guest.
If you do try to get the guest to pay for the oven door, please let us know how it goes.