Complementary to DEEBOT X2 OMNI It is advised to replace it every three months. Our products now contain the antibacterial agent SILVADUR TM 930 Antimicrobial (EPA Reg. No.:464-785), which imparts antimicrobial activity and inhibits the growth of mold, bacteria, and mildew, including Escherichia coli, Staphylococcus aureus, and others that could cause discoloration, unpleasant odors, or deterioration of the treated product.