My Hemp clothes are way better to clean my camera than micro-fiber cloths, paper towels or cotton t-shirts. Over time the hemp clothes get softer and wear in, so it's no surprise why my old hemp shirt is really good for cleaning my camera lens. Hemp is better at absorbing water than other fibers. When I am out and need to clean my lens, I breathe on the lens and wipe it off.
I also make sure my breathe is clean and don't really do it unless I am not happy with how dirty the lens is.