Dash A/C blowing black film
Our 2008 Monaco Knight has a problem with the dash A/C (besides being a rather limp A/C). It tends to blow out little pieces of thin black film. The biggest pieces I've seen have been about 3/4" wide and 1/2" long. When you try to pick them up they fall apart. If you accidentally step on them they smudge into the carpet and leave a stain.
The RV mechanic an National Indoor RV used compressed air and a long brush to try clean out the ducts, but the problem continues. They did not know what was causing it. It doesn't appear to be mold, because it hangs together more as a film that disintegrates.
Has anyone else had this happen? If so, what caused it and how did you fix it?