Hi Mike, patience is probably key now. but brush every surface and next day do a slow steady vacuum of the bottom.
one trick I did when mine was almost black from leaves one year. I left the vacuum at the low level floor for a day to help
clear it until I could see the shallow end floor.
one trick I did when mine was almost black from leaves one year. I left the vacuum at the low level floor for a day to help
clear it until I could see the shallow end floor.