My babies enjoy it most with a VERY warm spray bottle. They will turn themselves around and let me get them everywhere. I was bathing my youngest everyday because she LOVES it but had to stop because it was making her feathers lay flat and not so pretty.
Spray the bottle on your wrist. It should be a little warmer than a babies bottle. Then, get them to a place where you can work and spray away. I think you'll find they love it.
If not, they will bath themselves in the water they drink from usually. In my case, no matter how many birds baths I try to use, they always prefer bathing in their drinking water
Alot of people here have birds that prefer a warm bowl of water at the bottom of their cage to bath themselves, mine are too lazy for that.
Good luck, welcome to the board and please, share pics!