Mouse Smell and Insulation

There are a lot of threads on this, but maybe someone can help me with some specific questions.

I unwarily left a box of birdseed in the garage. A mouse was happy to find it, and set up housekeeping in my PiP. There were piles of fluffy white insulation and caches of seed under the HV battery and behind it, under the back seat, and a little bit on top of the air conditioner filter.

Is there any place else I should look?

I cleaned things up with a shop vac, replaced the filter, and wiped up with Nature's Miracle which I hope will get the smell out.

Where did the fluffy white insulation come from, and how concerned should I be about replacing it?