I did clean a little bit last night. Scrubbed slate, the heater, and the pump.
Scrubbed down the hood.
This is the inside of the hood.The pump fits down into the big hole by Karma's head. Water is rushed across the rectangular space next to the hole (where the filter is supposed to be) and then there's a cylinder that fits in the section after that--it spins--and the water comes out the two little shutes you see sticking out below.