During the cleaning process, the Deebot sucks dust and garbage into the dust box and then discharges the air through the filter element, Using the filter element can effectively purify the discharged air and prevent secondary polution. The surface of the filter material is coated with a nano-coating, which is water restistant and can be reused after rinising. The filter material is treated with antibacterial agents to effectively inhibit the growth and reproduction of mold, bacteria, and other microorganisms (such as Escherichia coli and Staphylococcus aureus) that adhere to the surface of the filter element, preventing it from becoming moldy and smelly. The antibacterial agent SILVADUR TM 930 Antimicrobial and REVACIL has been added to our products, it imparts antimicrobial activity and prevents the growth of bacteria, mold, such as escherichia coli, staphylococcus aureus, candida albicans and mildew that may cause unpleasant odors, discoloration, or deterioration of the treated product.