Pretty please!
The methods I can think of atm are: Spraying with a mist bottle, taking them in the shower with you, providing a dish of water, or leaving a bowl of wet grass.
May we have some pics of your IRN?
She's actually the most regular bather out of all of my birds. 
Thank you!
- and I thought I might try again with the spray bottle. I got it out and showed it to him (it's quite big, but is mostly clear and has a gentle spray). He didn't move away, so I started spraying. I made sure to not spray directly in his face. Instead, I angled the bottle up so the spray would rain down on him from above. To my pleasant surprise, he started fluffing out his feathers, raising and flapping his wings, and turning around! It wasn't a super deep clean, but it was a great start. Made my heart so happy to see him enjoying himself
Pi isn't an IRN but he is in the same genus, so think might work for an IRN
I built a shower perch with a branch. I place it on the ground and he can grip it firmly and paces about in the water as he wants. I set it so part of the perch is out of the water and he has choice in the matter. Water is always cool-cold and I set it on a low setting.
It took a few weeks to get him comfortable in the bathroom and shower etc. Now that is the only way he baths so he will actually drive me to the bathroom if he wants a shower..via leaning and pinching... I am a well trained horse. The other day he was so excited about a shower he flew from my arm at the door to the actual shower.
Pi needs showers often normally he wants one every other day. I used the spray bottle before but it was too much of a mess for the frequency of his bathing. The shower is simply easier to contain all the splash and wet. I sometimes mist him in the shower also... he loves water
Thanks all for sharing your experiences and tips! Gosh your birds are so beautiful
A couple days ago Asriel had his first proper bath! I had been getting him desensitized to a spray bottle, and giving him little spritzes to see what he thought. He didn't seem to mind.
One of his favorite things is to splash his face in his water dish, so I thought he might like a shallow dish of water? However, every time I've tried bringing him one or bringing him TO one, he isn't interested at all and just tries to climb on me.
One day he was doing his thing, splashing in the water dish- and getting water all over my computer monitor
