Lens manufacturers say that anything other than a microfiber cloth will damage the coatings on a lens. But microfiber cloths eventually pick up crap and they look like they’re a pain to wash.
How do you keep your lenses clean? Are you using cloth/kleenex or microfiber cloths? If you use microfiber cloths, how do you clean those?
Use soap and water and rub it with my fingers. Shake the excess water off then use a microfiber to finish up. We use microfibers to clean around the house and always have clean ones handy.