Not sure if my method for removing streaks left by cleaning solution is "correct", but it works for me. I find that breathing on the effected area, not like blowing on it, but more the "ha ha" method to fog the area over with moisture from your breath, then wiping with a nice soft lint free cloth is the most effective method I have found to remove streaks. I haven't found a cleaning solution that doesn't leave streaks like you describe. I think it is some kind of chemical reaction with the coatings or something. I have also noticed sometimes more force/pressure is required to remove said streaks than would be recomended here, so use at your own risk. I have noticed no scratches or damage of any kind to any of my optics that I have used a bit more pressure on, I feel the key is No dirt or derbis left on the surface that could scratch anything, and keep it moist with your breath or cleaning solution. YMMV..

Ken