Alfie is a nightmare for baths. The only place he will consistently bath is in his water bowl... which he obviously can't fit in. So he sticks a foot in and flaps around, sploshing water over everything except himself. He usually waits until I'm not around as well, so I come back to a nice big puddle of water on the floor around his cage.
If I do happen to hear/catch him, I'll grab the mister and see if he wants a bath that way. He mostly hates it, but if I manage to catch him in the right mood then he'll get into it. I can only mist him in his cage though, as he'll fly away if he's out. Or just try and attack the mister/me. I've tried taking him to the sink, to the bathroom to see the bath/shower but nope, he's not having it. Only the water bowl will do. I even bought him a kids toy sink that was battery powered and had a little tap but he didn't like it at all, so I gave up on that idea.
If I put a bigger tray with water in at the bottom of his cage then he ignores it and favours the water bowl.
I did have a breakthrough more recently- I found some really big water bowls which are the same shape/material as his existing bowl and they clip on to the side of the cage. They hold 2L of water. At least he can fit both feet in that one and at least get a little bit of water on his body as well.