Hey Marcel.
Definitely try scenting first. It never worked for me but it's suppose to be reliable.
What DID work for me are one of two things.
1.) Live anole (long, skinny, green lizard of the smallest size you can find) in a small container with the snake and watch the two for a few minutes. If it seems like the anole might be too big despite your best efforts to find the smallest possible or it's just stressing the snake (because the anoles do seem to know "whats up"
just remove it.
2.) Freeze the anole and try again a few days later ONLY this time, with it thawed, snip off a piece of the anole tail. Use the blood, if any, to juice up a thawed pinky face and then shove the thick part of the lopped off tail into the pinkies mouth and just set the pinky-anole tail combo in the feeding deli cup. I bet it works first try, I've had huge success with this method.
IF it does work, use the juice from the cut portion of the lizard to juice up a second pinky and offer it after he/she is done with the first. No tail, arm or leg in the mouth though. Utilize the "feeding instinct" and lessen the triggers gradually. I'm betting too he/she will eat that second pinky without a tail, arm or leg in the mouth.
Those are some of the methods I tried. There was one non eater that would only strike at a full thawed only anole meal, I had to give him away for free but it was good to know he had some instinct to eat.
It's amazing to see the little guys perk up for anoles but they really do.