... washer or antibacterial for toys etc. You can spray air conditioner filters after cleaning. Swab air ducts ... the Nano Silver Anti-bacterial Agent is 5-25mg/L, you can use a sprayer to spray, ... 3-5 days per time as required.2. Disinfectant:it can disinfect the moist paper, ... surgical coat, mask, etc. you can use the spray method, the concentration is 10-30mg/L.3. Anti-bacteria treatment ...