The closet would have had lingering scent, which is why he stayed, but it was nice to see you allow him time to investigate without pressuring him or pulling him off of the lingering scent. You have the correct impulses, and often in situations like that you do exactly what you were doing. Basically saying, “Yes, good job, it was there”, and encouraging him to move on. Once you got him out of the area it was pretty easy for him to re-locate the new target. Underneath the dresser is actually a very hard hide, you both did excellent on that.