During operation, dust will build up on the inside surface of the filter hood. After every 8 to 10 hours of Dust Collector operation, vacuum the exterior of the filter hood. Just before you change the collection bag, tap the top and sides of the filter hood to dislodge the dust buildup. If you're generating a lot of fine dust, tap off the dust buildup more often.
After every 15 to 30 hours of operation, wash the filter hood to maintain optimum performance. Before washing, dislodge the dust buildup and remove the retaining strap. Then, hand or machine wash the hood in cold water using a mild detergent. Line dry or tumble dry on no heat. When the hood is dry, reinstall the retaining strap assembly.