Best way to get cockatoo in cage at night?

I wouldn't be surprised if the door size were a big factor.  If that's the case, they'd be better off getting a larger one first.  It's different if it's just a matter of not wanting to sign off for the night.  Allie CAG started getting difficult at night after I'd had her for a while.  Shortly before bedtime I would have her out getting scritches and other one on one attention, and she would refuse to get up on my hand to go into her night cage.  I added an intermediate stage to the process.  Instead of heading directly for her cage, after the scritch, we go on a tour, or go look at ourselves in the bathroom mirror, or if it's light out, stand at a window where she can watch the hummingbirds, or something else she enjoys.  She a lot more cooperative after this.  It's our ritual.