Gday fred,
I use the lens cleaning solution that Bintel makes/sells.
Have had no issues with it. I've used it on telescopes, eyepieces and camera lenses for several years now.
Be very particular about the cleaning cloth or tissues that you use. I shie away from using a single cloth (microfibre or otherwise), or household tissues, and instead use the Kimtech delicate task wipes.
Lens tissues do the same job.
cheers Phil
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