Hi Dialyt;
My advice about cleaning is “DON’T”. If you feel you must, avoid any rubbing motion and, in a very good light, check to be sure there are no particles on the lens. I am at work right now and do not have time to get into this discussion. I, personally, will not use solutions made for eyeglasses since most are uncoated.
Just this weekend I had a chance to check a set of Swaro 8x30 SLC WB that were down on transmission. After doing some checking I found the oculars coatings damaged by cleaning. The pictures attached look a lot worse than the binos do in real life because of the trouble I had lighting them for photos. Visually all you saw was what looked like a light fingerprint on the right ocular, the bright area in the photo. This individual cleans lenses with isopropyl alcohol and a napkin or paper towel.
Shown for comparison is an 8x20 curve that I had professionally measured as one of my reference set to compare to. This Swaro may be Swarobright, but I did not think so.
My main thought about this is whether you would rather be down in transmission due to dirty lenses or damaged coatings.
I will check back later today.
Ron