Pool Vacuum- Dolphin Nautilus CC Plus- Black Marks

[NateW18]

Hi All

Just purchased a Nautilus CC Plus robot pool
Vacuum. It works well but the black plastic is leaving black marks all over my plaster pool. Especially in the corners and walls. Anyone else having this problem? Anyways to remove the black marks?

Thanks

 

[Texas Splash]

Good morning Nate. Your question has sat for over 2 weeks, so I think it's time we help give it some attention before the season slows down. Curious, how old is your plaster?