Vacuum Bags Trap Bacteria, Dust Mites, etc. nMicro filtration Bags n nRecommendations To protect your motor and maintain peak suction power change bags when 2/3 full. When Vacuuming fine particles such as powder, plaster dust, etc., change bags more frequently. Do not reuse or overfill dust bags as a loss of cleaner suction and/or bag breakage may occur.