I have tried all sorts of things to keep the millet spays from falling and getting soiled. I have tried the gizmos that come from the pet food store and all types of clips. This is the first one I have found that is completely safe and effective.
Insert the millet spray though an empty toilet paper tube and the squeeze though the bars. As the bird eats the millet spray you can slide more in. If your bird wants some extra fun chewing on the cardboard, thats ok too. No plastic parts.