PM is treatable with citric acid spray, but I'd say you have thrips based on the spots on your leaves. I'd go with something like potassium salts of fatty acids (49.52%) which is called Safer's Insect Killing Soap here.
If you use that, turn off the fans when you spray it (undersides of the leaves is where most of the bugs are), and rinse it off after it dries. Then turn the fans back on.
If you use that, turn off the fans when you spray it (undersides of the leaves is where most of the bugs are), and rinse it off after it dries. Then turn the fans back on.