In this house, we don't throw out leftovers. Rather, we carefully curate them in the back of the fridge until they become unidentifiable lumps of green or grey fuzz.....THEN we throw them out.
I hadn't seen this before but I started cleaning it out on Thursday and finished today, Saturday. Maybe a shelf and a drawer each day so as to not become overwhelmed. One of the guys cleaned the oven. It sparkles. Limping along toward Thanksgiving.