Review on 🦈 Gotty 4 Pack Foam & Felt Filter Kit for Shark Navigator NV100, NV105, and more: Compatible with XFF450 & XFF480 by Christine Pochmara

Easier to replace than clean/wash/dry. housing with compressed air or with a workshop vacuum cleaner. A lot of black soot came out. I did this several times before installing a new HEPA filter. I think the black soot is related to engine bushing wear, definitely you should do this or your new filter will quickly become clogged.