I recently had painters in and ran a few ACs and portable dehumidifiers during the process. I've read it is fine to do so but in hindsight a bad idea.
One dehumidifier started smelling funky, then both ACs started smelling bad. I cleaned the ACs with JHC AC cleaning sprays, then used Scotch Brite disinfectant to wipe the inner fins. So far no more smell, but the dehumidifier wasn't salvageable.
What do you think was the cause?
The paint used was Dulex Pentalite.
Also, how to clean inside the vent area? Profession cleaning? Looks like black mould, should I be worried?