Tevilla with a sticker

I toiveled something with a sticker on it- do I need to say a Bracha when I retoivel it? Also I have a dish that I’m not sure if I had previously toiveled, should I be making a brocha on it?

Dipped with a sticker, dip again without Bracha. Dip the doubtful utensil without a Bracha or after a utensil that requires a Bracha anyway.