Oh— it’s a room? Or... more like a closet that cooks food. There’s a dinner plate thing at the centre of it that rotates to make sure nothing explodes while it cooks. Most often they’ve used it for potatoes, so everyone calls it that? There are tiny versions of it in the kitchen here! Much more practical, I think he’d like them if he were here.

[He sure did just describe a closet sized microwave.]

Not as far as I’ve seen, but I also don’t always get to work with him. It’s possible he made use of it during another case. It’s um... also possible that he got distracted by another idea and hasn’t gotten back to it yet.