My first Airstream was the 2005 CCD 22' - it has a china bowl and a sprayer.
In my ignorance I thought my sprayer was broken. Then I found out that it only worked when my foot was on the flusher. Gee, that didn't make a lot of sense, standing over an open drain in July trying to get a little product off of the inside of the bowl, with a wide open sewer - gently wafting fermenting methane up at me...
Then I suddenly realized... wet bath, sink faucet doubles as shower wand... warm water dissolves product faster, THEN you flush. Never used the wand again.
Cleaning the wet bath was super easy too, a couple of scoushes of scrubbing bubbles, on all the surfaces, wipe down, get out the shower wand and rinse all the mess down the floor drain. Wipe the seat dry and leave on the fan so evaporation can do it's thing. Must say I found the shower bigger and had plenty of room when seated - just wouldn't have worked when one wanted to shower and a partner wanted to be seated.