Unplug the unit and pull the collection grid from the top of the unit to remove it.
Wash the collection grid in warm, soapy water, wiping the three collection bars with a sponge.
Rinse the unit thoroughly with clean water and allow the unit to dry for 24 hours.
Dust the entire unit with a compressed air dusting product. Remove any particles that have accumulated inside the unit or on the ionizing wires.
Turn the entire unit upside down two or three times and replace the collection grid.