Blue Pearl Loses Traction

(Copied post from the Pooltalk forum by someone who can't register here)

I have the Blue Pearl robotic cleaner and so far it seems to work great with one small exception. When it's on the incline from the deep end to the shallow end it spins a little when it tries to turn. This keeps it from making the 90 degree turn it's supposed to make and inevitably it just ends up going back to the deep end instead of methodically cleaning the slope as it does on the flat areas of the pool. Has anyone experienced this with the Blue Pearl or other robotic cleaners? I know from reading other posts that spending too much time in the deep end seems to be a common issue. Is there a way to help the cleaner maintain grip on the slope?

BTW, my pool is a vinyl, 18 x 36 rectangle. App. 20k gallons I think.

TarheelPool

Check for clogs and that the filter bag is not clogged either. Since the thing sucks itself down, it should have no problem.

BTW, I am cross posting any replies to the pooltalk.info forum (so we have a complete answer posted and the poster gets notified of the thread update). If any poster has an issue with this please let me know.