I have a ton of flukes but I don't have any confidence in them. How did you fish the fluke? Weighted hook or weightless?
I just rig them up using the t-rig with light weight. The pond I fish has a weed/moss bed about 25-30 feet out from the bank. I toss it out past the weed/moss bed and let the fluke flutter/fall in the deep area. I bounce my rod tip to make it flutter like a wounded fish. if there one in the area it will hit during the fall, raising your rod tip you will feel it. I never had confidence in them til, I left my worm bag at the house one fishing trip. I found a fluke on the ground and fished with it. They were nailing it. My little mistake made me have confidence in it.
Lots of people use jig heads with flukes. I never have because at the time of my mistake, my reel had a t-rig on it. It works for me. Good luck. hope I helped you.