The printer is in standby/off status.
Open the filter door on the right side of the printer.
Unscrew the Air Intake Filter and clean it with a vacuum cleaner and a soft brush.
Clean the powder from inside the cavity and the right side door.
Wipe the filter chamber with a damp, lint-free cloth.
Make sure all powder is wiped away. Then wipe the filter chamber again with a dry, lint-free cloth.