When I was first teaching my now bonded glider to come when called, I would walk over to her cage at night while she was awake and call her name and shake the treat bag. Once she came over I gave her a treat. I did this several times a night. I would wake up while sleeping or turning over in bed, I would call my gliders name, shake the bag, and then give a treat, then go back to sleep. I did this for a few weeks until the point where if I turn over in bed at night, she will jump over to the side of the cage and chirp at me like "hiiiii mom I'm here for my treat". It's the cutest thing.
When I do bathroom bonding, I shake the treat bag and call her name. She hops or glides right over to me, every time. It's a habit now, I call her name even without shaking the bag, and she comes over. Not for a treat, (well I'm sure she wants one every time
) but to be pet and loved on.
My new glider has picked it up as well. I walk over to their cage at night or if I wake up in bed, call kiwis name, she jumps over to the side of the cage, and Kona follows her. Just by Kona hearing kiwi munching on the piece of dried fruit, she has learned "oh, so this person says that word and it means treat and love." She will also follow kiwi in bathroom bonding when I call kiwi over. Kona hops right after her. She hasn't gotten comfortable enough to glide to me yet like kiwi does, but she will eventually
Hope this helped!!