It works!
This morning, I went to check on the 2 lizard traps. I found a big, fat lizard trapped in the one next to the computer table. Unfortunately, the other one in my studio is empty. It's either the baby lizard is super smart, or the bait in the box is not tempting enough for it.
Nevermind. I'll leave the box for one more night and see how. If it's still not trapped by tomorrow, then I'm going to use insecticide.
To the baby lizard: I know where you're hiding!