Need to improve my kick

So my kick sucks, or rather I don't do much kicking so it's very inefficent. It takes me about 30 seconds to do 25 meters. I don't use fins since I don't much like them. I have a very slow two beat kick in freestyle, and on longer fly sets I'm lucky to get one kick per beat. My only strong kick is in the ***. I'm a strong swimmer, I'm close to having a top 10 in the 200 fly, so it's not a case of the rest of my stroke being bad. I think that if I can actually get some sort of kick then I can drop my times. I do dolphin kick off the walls, and that works well for me. I've tried swimming 25s underwater kick, but that doesn't work for me, after a couple of kicks I slow down and they are inefficent. So how can I improve my kicks? Do I need to do 1000 kick sets every so often? There are times when I try and kick during workouts, but I seem to forget after a minute or so. It seems to me that while I have stong legs, they just don't want to kick, maybe my core isn't strong enough, and my mind says, you're moving fast enough, why worry about wasting the energy kicking? I think this is my breakthrough to the next level, I've been at my times for awhile now.