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?
I wear cotton t-shirts, so I have a drawer full of clean ones. I wash my glasses with foaming hand soap with my fingers, then dry with a shirt from the drawer. Not really had any problems, but I buy polycarbonate lenses with no coatings.