white powder/fuzz
 

Hi Ron, Ive acquired 8 mothers that came with what appears to be a white powder/fuzz that starts like a light dust then a powder then to a thick fuzz mostly on the older leaves. Ive taken 300 clipings and have trimmed any leaves showing signs and it looked like I had beat this but it has started to resurface once again. ive tried to increase fresh air to my rooms and installed another wall fan in both as well. I would be most thankful if you could help identify the problem and any solution to best defeat it thanks ron

Sorry plant diseases is not my forta.