Bleach
"The musty smell of the attic filled my nostrils" BWHAHAHAHAHAHAH
The first step to getting a musty smell out of a closed up house is to open the windows. You will also want to burn some candles. Spraying Lysol will also help get rid of the musty smell.
Buy a dehumidifier. Rent an ozone generator. Info on my site.
It will take ventilation and time.
Musty, dusty, humid.
The musty smell that Brian notices when he wakes up is caused by the dampness and mold growth in the shelter. The combination of moisture and lack of ventilation can create a musty odor.
you wash it????
Vinegar
wash everything and febreze...
If you are looking for more information on what do you do to get rid of rodents in the attic, the best place to look is on www.terminix.com they will get rid of them for cheap.
try using an air freshener
A "musty" smell would describe a damp animal