Instructions for Use Cleaning and disinfection40 / 65 305935-9900-000–1.3 – 2020-08-25-for USACleaning and disinfectionCleaning8.1.1 Cleaning optical surfacesThe multi-layer T* coating of the optical components (e.g. eyepieces, objective lenses) ensures optimumimage quality.Image quality is impaired by even slight contamination of the optics or by a fingerprint. To protect theinternal optics from dust, the system should never be left without the objective lens, binocular tubeand eyepieces. After use, cover the system to protect it from dust. Always store objective lenses,eyepieces and accessories in dust-free cases when they are not being used.Clean the exterior surfaces of the optical components (eyepieces, objective lenses) only when necessary:▪ Do not use any chemical agents.▪ Remove dust from the optical surfaces using a squeeze blower or a clean, grease-free brush.For the regular cleaning of objective lenses and eyepieces of the surgical microscope, we recommendthe optics cleaning set available from ZEISS.8.1.2 Prevention of foggingTo protect the eyepiece optics from fogging, we recommend using an anti-fogging agent. Anti-foggingagents provided by eye care professionals for use with eyeglass lenses are also suitable for Zeisseyepieces.Please observe the Instructions for Use supplied with each anti-fogging agent.Anti-fogging agents do not only ensure fog-free eyepiece optics. They also clean the eyepiece opticsand protect them from dirt, grease, dust, fluff and fingerprints.8.1.3 Cleaning mechanical surfacesAll mechanical surfaces of the system can be cleaned by wiping them with a damp cloth. Do not useany aggressive or abrasive cleaning agents.Clean off any residue using a mixture of 50 % ethyl alcohol and 50 % distilled water plus a dash ofhousehold dish-washing liquid.