Check your cab filter on the outside of the cab, if its plugged it will absorb moisture and that can cause it. There is also a filter behind the "buddy" seat in the cab. to access it you have to pop out that tray above the budy seat and reach down in there and theyll be a filter with a handle. when our 9500 fogs up like that i know its usually time to clean the filters.
Hope that helps.
Hope that helps.
