Bresser Scala Gebrauchsanweisung Seite 11

TIPS on cleaning
Lenses (eyepieces and/or object lenses) should
be cleaned with a soft, lint-free cloth (e.g.
microfibre) only. Do not use excessive pressure
- this may scratch the lens.
Dampen the cleaning cloth with a spectacle cleaning
fluid and use it on very dirty lenses.
Protect the device against dirt and dust. Leave it to
dry properly after use at room temperature.
DISPOSAL
Dispose of the packaging material/s as legally
required. Consult the local authority on the
matter if necessary.