11. Maintenance11.3 Cleaning the lensTo minimize the possibility of damage to optical coatings, or scratches to lens surfaces, we have developedrecommendations for cleaning. FIRST, we recommend you try to remove any material from the lens by blowingit off with clean, dry deionized air. DO NOT use any liquid to clean the lenses.Necessary toolsToraysee TM cloth (delivered together with the lens kit). Order number : R379058.How to clean the lens ?1. Always wipe lenses with a CLEAN Toraysee TM cloth.2. Wipe lenses in a one single direction.Warning: Do not wipe back and forwards across the lens surface as this tends to grind dirt into the coating.3. Do not leave the cleaning cloth in either an open room or lab coat pocket, as doing so can contaminate the cloth.4. If smears occur when cleaning lenses, replace the cloth. Smears are the first indication of a dirty cloth.C AUTION : Do not use fabric softener when washing the cleaning cloth or softener sheets when drying thecloth.Do not use liquid cleaners on the cloth as doing so will contaminate the cloth.Other lenses can also be cleaned safely with this Toraysee TM cloth.108 R59770495 DP2K-23B 30/04/2010