Room Dust and Records

I'm a new Degritter user and upon cleaning new records and examining the record with a tactical flashlight, I can see dust on the record prior to removing it from the Degritter.  I assume that this is dust from the air.

I have a dedicated room where I have removed paper product and use a large HEPA air filter and vacuum.  I also keep humidity around 55%.  What else can I do to mitigate dust?