These have been very popular, can you place a small dish of food beside the Tidy seed dish for a few days, then slowly diminish with what is in the small dish and increase the food in the Tidy Feeder. Entice them with a treat placed in front.
Is the dish close enough to a perch so they can get in it by just sitting in front of it to access the bird food?
Cockatiels often will not like to be acrobats and want things easy to get it. An additional perch within an inch or so of the entry in the Tidy Seed bird feeder may be helpful?
Once the bird gives it a try they will love it and you will have less mess to clean up.
Let me know how it goes.
Windy City Parrot Birdie Boutique
They really work well and once they get over their “spook” they will enjoy them, you will enjoy less clean up.
Glad you figured it out. (smile)