Filters - Cleaning of: recomendations

[fwm891]

Whilst I can remove dust and other loose items with a blower and even resort to flat frames for those I've missed. I find it very difficult to remove entirely the odd fingerprint residue/smear completely.

I've tried Optic Wonder but find my best results are with plain clear ethanol on an optical micro fibre cloth. Even then I can see smears where the cloth is lifted off the filter...

Sugestions please.

[discardedastro]

First Contact if you want perfect...

https://www.photoniccleaning.com/default.asp

But for anything but semi-permanently-installed systems, probably overkill. Optic wonder works OK - I find Sticklers splice/connector cleaning fluid (designed for fibre optics) works well at removing smears. Nearly-neat IPA (90% or so) also works well.