Wow ... I know how frustrating this can be...
My AH came into the kitchen the other day while I was cooking and kept turning the stove off and taking the pot off the stove (and I had just started cooking... so the food was far from being done). I guess he thought he was the one cooking or I was burning his food or something! Just one of many examples!
In these moments he reminds me of an insane person... or someone that has Alzheimer or Dementia... he just has no idea what's going on around him.
I just try to ignore him when he gets like that, which is somewhat challenging at times. I wouldn't even bother explaining to him that it's you who is cleaning the fridge... probably wouldn't get through to him!