I want to chime in with support for
OdorMute (unscented product) that works, followed by Natures Miracle,
Rocco & Roxie (nice scent), or any of the commercial
enzyme-based cleaners. The only way to get rid of the odor is to have enzymes break it down. All of the others are a fragrance cover up Band-Aid. You will have to get the product directly on the area where the mouse died to break the proteins down.
The advice to change the cabin air filter is also good, even if you don’t have an odor problem. We just did that and it improved the flow of our air conditioning immediately!
I’ve used Odormute in an overnight soak in the washing machine to get rid of doggy scent or other odors in fabrics. After the overnight soak, just wash as usual.