Originally posted by ezhfjs
Thanking you in advance for your help with this
Get a hand spray bottle(like an old windex bottle)
make a solution of 4 parts water 1 part bleach to spray into air the ducts airstream.Try to avoid spraying mist through the blower at first.Enter downstream,after blower.
See if that works.....If not,then try a fine mist through the blower.
This is a cheap and easy solution.It sometimes is all you need.
Sometimes there are compounding complexities of multiple variables that are not intuitively obvious