Not sure where to post, hope this is an appropriate forum.
I have this expensive (to me at least) Kenko Pro1 Digital UV filter that I've been trying to clean for the past few weeks. I started with a lens blower and a microfiber cloth, then I tried Walmart Pre-moistened lens cloths, then a lenspen, then trying various combination of a lens blower, a lenspen, pre-moistened lens cloths, running water, 99% isopropanol...
The lens blower wasn't able to remove all dust particles.
The Walmart pre-moistened lens cloths actually left very tiny lints.
The lenspen (original) brush removed but also brought some dust particles to the filter, while the cleaning tip actually disintegrated into clingy dust balls (and it's new, I just bought it 2 weeks ago.)
Running water seemed to be the most effective at removing all dust particles but of course, it left streaks.
The 99% isopropyl alcohol also left streaks and marks, which could be removed with the lenspen -- but like I mentioned earlier, the lenspen introduced a new problem. (And I was informed from surfing the net that 99% isopropyl alcohol doesn't leave streaks. )
Both the pre-moistened lens cloths and lenspen are not satisfaction guaranteed (no wonder).
So I kind of give up on cleaning this filter now. But before I throw it out, I want to ask if anyone have any suggestions on what I can do with this dirty filter beside just throwing it out?
The filter wasn't that dirty to begin with, lesson learned, I should have just left it alone. Back then I cleaned filters all the time, but I guess I never put them up close against a bright light source and really really stared at them from different angles.