RE: Scope Cleaning
I use a lens pen(available at any hunting store) and for spots i just breath on the lens and then use the felt end on the pen in a circular motion. Never had a problem or damage with using a pen and they are very reasonable. The other option is a silk lens cloth(available at any eye glass place), again circular motion and breath on the lens to remove water spots, etc. Either are safe and effective on any optic len.