I am currently in a battle with my landlord over what I believe to be mold growing on the fiberglass liner of the ductwork in my apartment. He is having a specialist come to test it tomorrow, and I have picked up my own DIY mold test and am waiting for it to incubate and product results.
I want to get a community opinion though. I already know that it's not definitive without proper testing, but please offer your $0.02:
