My 2002 Explorer was strored for a few months in a garage that had a
mouse problem.

When I started driving it again I got a bad smell out of the
ventilation system. After about 6 months it subsided biut recentlt I
get a bit of dry debris including what seems to be whiskers coming from
the vents, especially the defrost vents in the dsah.

I can only suppose that a mouse got into the sytem somehow, died and is
now mummified. Where is the air intake for the vent system located? Is
there some sort of filter or screen that would have prevented the
culprit from getting too far into the system?
Any suggestions?

Thanks, Rob