None of this is supposed to happen, but of course it does. One or two people supposed to do toilet, water and clean a/c toilet, galley, seats. floor etc.... Welcome to LOW COST!!
Low cost ?
You need to get out of your cockpit more. I am talking about Air New Zealand which at least where I was a baggage handler did not use water carts. The uncovered hose reels are connected to airbridges owned by this airline which is not a low cost carrier by any stretch of the imagination if you'd ever bought a ticket from them.
a/c are NOT clean..... Any cleaning done is a tart up job in a hurry......
And yes the cleaning gangs also handled bags and water filling. And just to make you feel even more assured, Air NZ is about to contract out aircraft cleaning to save money so whatever practice went before, the new contractors will be cutting even more corners.
Low Cost Carriers don't even bother with cleaners. Cabin crew clean the seats and F/Os help with baggage. Heck they probably won't have time to drink the water...