My bad.
The discussion were problems using ROR,
which contains ammonia, in conjunction with certain microfiber cloths and cloths that may have been treated. Apparently, a lens tissue might be the way to go, but it may still streak and leave deposits.
The potential problem is, and I'm guessing, microfiber cloths have taken the photographic world by storm, and more often than not, there's little or absolutely no technical information (other than manufacturers' claims of efficacy) available at point-of-purchase of many microfiber cloths, so users are left to chance to find out if ROR was dissolving any treatments that might have been applied to the cloths.
Also, a 'swab/dissolve and lift' technique needs to be adopted, as circular rubbing may re-deposit the dissolved gunk back onto the lens, which some suspect is the cause of the 'swirls' and streaks left behind after cleaning.
I was first very impressed with how well and how easily ROR cleaned, but I became a bit concerned with the effect that ROR may have been having with cloths I know nothing about, and will likely not be able to find out about easily from a manufacturing point of view. Please let me EMPHASIZE that in principle, the problem does not seem to lie with ROR and it's ammonia per se, but the use of ROR in conjunction with cloths.
I have since switched over to an ammonia free Zeiss solution. If anything, at least I would have more peace of mind, at least till I can find a ready supply of affordably priced Kodak or Olympus lens cleaning paper.
All said and done, I'm nit-picking. I generally only use a lens cleaning solution once in a long while. Probably looking at a few drops in 3-6 months? More problems are caused by over-cleaning than not cleaning.
Edit to add: Anyone wants to buy a very slightly used 2oz bottle of ROR? Lightly as in squirted twice for two cleanings. $10. I paid $14 for it.