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 have a spray bottle with an isopropanol water mixture (around 10% isopropanol) and I just give my glasses a good spray and then wipe them with a clean microfiber kitchen cloth.
(I wash these cloths with just detergent powder, no softener or other additives, so they are grease-free out of the washer)