I have the Ateco witches hat flower nail for roses and a half ball shaped one for dahlias. How do I get these flowers off the nail, you can't put wax paper on as you do for the regular rose nail.

For my lily nails I use foil that I smooth really well. I dont know what these look like to know if that would work for you.

Yes, foil smoothed well is your answer - then lightly grease it.
One could grease the flower nail well but sometimes that doesn't help

The witch's hat is a regular flower nail but with a peak on it to replace making the cone for the inner part rose out of icing. It looks exactly like a witch's hat. I always use wax paper for the regular nail so never thought of using foil. Thanks