For a quick clean, first remove obvious dust and dirt with the brush. Then, with one of the moist wipes, use a circular motion from the inner part of the lens to the outer rim. For a thorough cleaning, again first remove obvious dust and dirt with the brush, but then place a few drops of lens cleaner on the microfiber cloth. Use a circular motion from the inner part of the lens to the outer rim and dry the lens with the dry part of the cloth. Don’t forget to wash the microfiber cloth regularly.
This is the essential kit for keeping any optical device clean, either at the base or in the field.