I'm not sure it's that safe to always use cleaning solution. And it's not all that necessary. I use a cloth regularly and I use solution every now and then, let's say once in 10 cleanings = perhaps once in 1-2 months or so (there is a build-up of stuff sometimes which cloth can't get out).
I doubt solution, although safe, was intended for daily use. I know people who clean with lenses every time they get their gear out of the bag and every time they put it into the bag... hmmm, not sure. I mean how long is that coating supposed to last? Maybe it's more of a dogmatic belief, but I'm fine with it. My method works for me.
Now, after a paint splash, I guess nothing but solution works.