OKS 2650 is supplied ready for use. Additional dilution is usually not required. The cleaner has to be diluted more (1:10) to clean mirrors and glass surfaces. After spraying on, rub in mechanically and let it soak in for some minutes. Then rinse with clear water. Repeat the application at stubborn soiling. Caution: In the case of metal surfaces that can corrode when in contact with water dry the cleaned service thoroughly. OKS 2650 is not suitable for cleaning alkali-sensitive materials, acrylic and polycarbonate glass. We recommend therefore that you check the resistance of the surface before use.