Spray some Febreeze around in that house bro. From personal experience, I found it works very well.
Then you must somehow get rid of the corpse.
Remove the dead birds
move
it won't get rid of it but it will help with the putrid undertones of rotting carcass use BacaTec
The Only Way To EVER Get The Smell Completely Out, Would Be To Find It. Call an exterminator to do the job.
The smell of mothballs can be difficult to get rid of but heating up the area for a few hours to release odors, then airing out the area is one way that can help. Cleaning the area with vinegar and baking soda and using charcoal to help absorb the smell are other ways to rid your home of the smell.
clean it, then spray it with air freshener.
If you are married to him divorce him, if you aren't married get rid of him. Change the locks.
First remove the dead squirrel, then clean up the area with bleach and water. next, spray some air freshner daily until smell seems to disapate....you may have to repeate the bleach and h2o process...
Adding a diluted solution of Chlorine to the water should sanitize it and rid it of the bad smell
If you are interested in home remedies to help get rid of the skunk smell, there are some available. The most popular and commonly used is bathing in tomato juice.
Febreeze.