Camera lense Maintenance

[branches]

I have a Nikon Nikkor 24-120mm lense and when I focus on my subject in manual mode the ring is kind of sticky and I have to play around with it to get it to focus. What can I use to clean the ring? I would like to lube the ring with some sort of dry lube. How do you photographers clean your lenses?

[Firedogg]

That more than likely is an internal issue. Other than the lens and the inside of the mounting end anything else on my lenses gets sent in to a factory repair shop for cleaning and lubrication. Start adding lubricants incorrectly and in the wrong place, even dry ones, and you are creating a recipe for trouble inside the lens.

[branches]

Thank you for the information. I will have to send it in for cleaning.