I got my cockatiel from an abusive situation and since I'd never owned birds before, I started reading and trolling the internet for info.
I tried putting a dish of RO water down for him, but he climbed to the very top of the cage and stayed there all night.
So, about a week later, since his cage has partial sunlight in it, I waited until it was nice and warm, then misted him. First time, it was a disaster, and I calmly, quietly told him I wasn't punishing him, but rewarding him. Of course, he doesn't understand.
However, the next time, he spread his wings, ducked his head and fluffed, over and over. He was so content for the rest of the day.
BTW, I'm jealous of other owners who can touch their birds and interact with them. My bird is much too frightened of me even after months....