How do I clean the optional PLASMA filter, and are there any safety warnings I should know?

The PLASMA filter should be checked and cleaned once every month or more often if necessary. To clean, dip the filter in water mixed with mild detergent for 20–30 minutes, then dry in the shade for a full day, ensuring all humidity is completely removed. Do not touch the PLASMA filter within 10 seconds after drawing out the Air Cleaner Bracket, as it may cause electric shock, and be careful not to cut the electric discharge lines while washing.