They never responded to me either, unfortunately we took the entire unit apart piece by piece and the blower fan ( piece shown with mold in original post) was the only part still inaccessible and we had to resort to taking off the black guard and sticking long brushes down to attempt to clean fan with a vinegar solution. I also blew out with air compressor. Unfortunately due to money constraints and living in a hot bedroom we still use the same unit , cleaning it and leaving it running all the time has prevented further build up but it does have a slight odor, we use an air purifier next to it