Product and accessories: Use only a clean, soft, lint-free cloth for cleaning. If necessary, moisten the cloth with water or pure alcohol. Do not use other liquids; these may attack the polymer components.
Damp products: Dry the product, the transport container, the foam inserts and the accessories at a temperature not greater than 40 °C/104 °F and clean them. Remove the
battery cover and dry the battery compartment. Do not repack until everything is dry. Always close the transport container when using in the field. 
Cables and plugs: Keep plugs clean and dry. Blow away any dirt lodged in the plugs of the
connecting cables.
Connectors with dust caps: Wet connectors must be dry before attaching the dust cap.