Cleaning lenses

I need to clean the front element on one of my SMC Pentax lenses.

It's not terribly dirty, just a few specks that aren't dust. But it'll need a little rubbing, and I don't want to risk the coating.

Any tips?

TIA

For small stubborn specks:

Breathe on lens then wipe with edge of lens pen tip:

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I believe that SMC coatings are far more durable than you might think.

I once had a pair of spectacles with Pentax lens (totally brand loyal) that had a a reflection/glare reducing coating (not SMC I know). I used those glesses for over 5 years regularly, cleaning at least once a day, by breathing on the glass and wiping from the centre with a Pentax microfibre cloth. The coating was still there right till the end.

I find the same process works fine on my SMC lenses.

Many years ago, in America, Pentax used to run ads showing people stubbing out cigarettes on the front element.

Can't say I've tried it myself.

G

I clean lenses when necessary, not too often hopefully, by using the Pentax microfibre cloth.

Flick off any specks, breath on glass, allow to evaporate and then wipe with cloth.

It's worked well for me for a very long time with no signs of damage to the front elements of my lenses.