Cleaned up a garage a couple of years ago. Deer mice infested with urine stains and feces everywhere including boxes and equipment. Got myself medically cleared, fit-tested with a full-face respirator with proper cartridge, Tyvek coveralls, booties, and gloves. Got after it with a spray bottle with 10% bleach followed by use of Craftsman wet-vac with HEPA filter. Took care of the problem myself and plastic bagged lots of destroyed papers and books and took to the waste transfer station. Knew I handled it safely with no adverse effects.
Good if you know what you’re doing. I’m a city girl, so I would call the mouse man.
Good approach... better to be Cedar Dave than Hanta Dave.