Glass sliding shower door very squeaky to open/close
I have a very standard glass shower door that opens & closes on a normal roller-ball track (sideways). But it has become very squeaky over the past couple of months (it's only about 1.5 years old). It doesn't appear to be the track that's squeaky, but instead the rubber seal that runs vertically along the inside edge of the door. I assume it's because it's rubbing along the glass. I have obviously tried cleaning the glass & the seal, but with no success. I assume it needs some form of lubrication - any ideas please?
Thanks