It would be a shame to own a pair of binoculars worth several hundred (or even several thousand) euros and not take proper care of them, wouldn’t it? Yet we rarely scratch our lenses intentionally. It usually happens through laziness, rushing, a lack of attention, or simply because we don’t know the right techniques. Wiping a lens covered in dust, quickly using a T-shirt to remove a fingerprint, or cleaning it with the wrong product can all lead to the first micro-scratches appearing. Over time, these tiny scratches can become permanent marks on the glass. In this article, I’ll explain how to properly care for and clean your binocular lenses without damaging them. Some of these practices may seem obvious to experienced users, but they’re not always followed. The result? Scratched lenses that can eventually affect the optical performance of your Swarovski, Leica, Zeiss, or Nikon binoculars.