You eventually have to reset and keep up the pressure. That's probably where you're running low at.
You can do two things. You could have a command normal that is pretty high priority that can be cancelled into a special which checks your air space. That way, they can't jump. You still have relative advantage and if you delay it to let them respond, you might hit them. If they block it, you cancel into a pretty low recovery special and go in for more pressure. Results may vary as some characters might not have a fast recovery move to do that.
Using K' for example. I'll do d.B x2, qcf+A, d.B, qcf+A, b.B to reset my pressure again. If they're too scared to press buttons, I get to keep going.
Another thing is to run them down. Using characters with cancellable sweeps, delayed heavy attacks, or just constant hop pressure, you dash in and poke them with lights into any of those options. Getting the rhythm down is a bit difficult, but once you get it, you're automatically checking a space they might not be protecting or keeping them pinned in a defensive position.
