Mrs. NNM decided a pre-Thanksgiving cleaning of the oven was in order. So she used the self-cleaning function, which basically just superheats the oven for 5 hours, incinerating anything in it.
Well, she forgot that she had a silicone oven liner on the bottom of the top oven. Basically, a little shelf on the bottom to catch drips, crumbs, etc. When you superheat a silicone oven liner, you incinerate it, and the particles get plastered all over the sides, top, bottom, and door of the oven, and get sucked into the convection and fan system. Making the oven unusable forevermore. And because it's a dual oven setup, both are now trash.
And these are not old ovens. We built the house 3 years ago. And upgraded the appliances.
So now we're looking at about 5k to replace perfectly good, upgraded ovens. A day before Thanksgiving.