Hi only cleaned the round glass. That one is the outermost glass.
I didn't touch the other parts at all. I don't have enough courage to go into that unless it is really necessary. ;p I had to dismantle and put together a zoom lens of my old Olympus SLR before.. phew... what an experiment it was.. :sweat:
I really do not understand why the lens cleaning alcohol leaves these colorful marks on the lens. I had the same issue. You may try to remove them using a cotton ear swab. I don't want to say that, but you may try to dampen the cotton swab. Water seems to be the only "clean" cleaner... and be kind to the lens coating..