Flex 3401 lubrication

[bicycle]

I`ve been using my Flex for a couple of months and I`ve seen some threads on lubricating the felt ring. I`ve not done that. Can someone help me tell me what exactly I need to do??
Thanks

[TroyScherer]

You use the supplied Allen wrench to remove the backing plate. Then take some "air tool" oil and apply it to the felt ring that is recessed into the housing. I simply apply a few drops all the way around and let it soak in. Then reply the backing plate and you are done. I don`t now that it is a must, but I do mine every month or so. I would rather be safe than sorry.