I've never heard of fogging of cleanrooms for pest control, and probably not a good idea.
Generally, you want to keep any contaminates away from your production area, pest chemicals especially considering the fact that you introducing a contaminant to your device that sterilization cannot correct.
Pest control is typically regulated to outside of the building, warehouse and general office space.
Fogging for disinfection of a cleanroom is a different story and still not a good idea to have a pest control company do that for you.
From just general observation of your posts, I would question whether or not you need to find another auditor.