When Professionals Run Into Problems With Air Flow, This Is What They Do
https://star-wiki.win/index.php?title=20_Questions_You_Should_Always_Ask_About_Quality_Air_Duct_Before_Buying_It
If mold is spotted, it need to be dealt with right away just before it could breed and spread. Don't touch or move all-around in a crop if the leaves are wet as this can spread the condition.