Can the Filters on the Back of PD80 Pro and PD80 Be Washed with Water?

The HEPA filter elements inside and on the back cannot be washed with water, because washing with water will damage the electrostatic adsorption ability of the filter screen, and fine particles can easily pass through the filter screen that has lost its adsorption ability. The sponge back inlet filter cotton of PD80 can be washed with water, but it must be completely dried before being reinstalled for continued use.