I've been using Dolphin Nautilus pool cleaner for a couple of years now. But this year I noticed that one of the tracks started to come off and damage the rolls and the blue sweeps:
On the picture I almost put it back where it should be but you can see the damaged "white roll" and the "blue sweeps". And of course once it gets there (every 20 minutes), it starts traveling in circles and I can see it takes an extra effort to spin that bad track.
Since now I closed the pool and I have time where do I start to fix it?