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I doubt you damaged the coatings as they are usually tougher than you think. You probably left sleeks on it or the cleaning fluid
partially removed some gunk but now its smeared or something like that (hopefully!).
I've used Bintel's lens cleaning solution for years. Its awesome.
You need though to thoroughly clean off any residue. It will come off or simply reclean it and use several fresh clean nonscented tissues or perhaps microfibre cloth.
I change the tissue frequently when cleaning. If I were cleaning a refractor lens I use the Tak recommended approach.
1. Blow off any loose dust with a hurricane blower bulb.
2. Daub cotton puffs with a bit of Bintel lens cleaning solution on them. Use lots of them not just one. One daub throw it out, new one, one daub, throw it out. You goal is to remove the loose surface dust and grit. It leaves the lens a bit wet with the fluid but not dripping wet. You don't want fluid running down and somehow getting in the lens cell so use common sense here.
3. Don't let it dry. Whilst its still wet I use white unscented tissues.
One tissue, wipe one small section of the lens. Throw it out. Fresh tissue. Wipe a bit more, throw it out. Fresh tissue etc. Continue until all cleaned.
Now look at it held at an angle in light so you can see the reflection coming off the surface to see if you missed any sleeks. Wipe them off with a fresh tissue and if no go a fresh bit of cleaning fluid and wipe fully off.
Coatings are pretty tough and you can wipe a clean lens without any worry. But dust and grit on the lens will scratch hence the dauding step to get the dust and grit off the lens before you wipe otherwise you will leave fine scratches on the lens. I have done this on very expensive APOs and it works beautifully and leaves them like new.
Don't skimp on the daubing.
Don't attempt to skimp on the number of cotton puffs or tissues.
Use lots. I don't even turn over the tissue usually and reach for a fresh one. They are only worth a few cents each.
Greg.
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