Cab Smell?

[BuckTruck16]

Hey guys I have recently bought a truck in the past month, and it has been sitting for 5 years. So, it's sad to say that some furry critters have been making themselves comfy in the cab. I took out the bench seat and the sound denser stuff (they made beds outa that). I took out all of it to get to the bare metal. I noticed stains and decided to wire brush it and pour thinner on it. I then wiped it and painted it. A day went by and the smell is back. Is their places I should look? I checked in the glove box and got rid of the crud, same with under the dash. I have a feeling it might be in the cab corners since it is open. My father suggested putting bleach or pneumonia down there. Any tips or places were the smell could come from?