Or you can purchase and replace the rubber

You can actually remove the rubber, and clean it thoroughly under running water. I actually did that to my olympus 150mm f2.0 lens. But the rubber will become elongated but still useable. I not sure about sony, but if the rubber are not glued to the lens, you can actually try it.

Another way is your can try this video tutorial: https://www.youtube.com/watch?v=MJCyUkc8KEk

This post has been edited by sado.oi: Oct 25 2017, 03:42 PM