You can also buy cloths with Velcro tabs on the corners which are designed for wrapping around lenses (although it wouldn’t be beyond the wit of man to make your own).A simple towel work just fine as well. And it can be rather useful in the field.
Hermann
These days I use drawstring pouches for my binoculars (bulky manufacturers’ cases stay at home), and for scopes and scope components (I have an ATX/BTX system), I use a mixture of microfiber pouches, wrap cloths and neoprene lens protectors, depending on what fits best.