Dust

I am new to this watchmaking hobby, and on the re-assembly of a watch I took apart to replace the movement, I had this shiny, black metallic dial that I simply could not get clean.

No matter what I did, dust in large quantity would find its way onto the dial. To me, it seemed like a static charge was being created somehow because brushing and blowing only made things worse.

Just wondering if I'm the last one to know the solution to this or maybe I need to build a clean room, ha.