Drooling? NOT respiratory infection

I had a mobile vet come to my house twice, second time was today. She determined my Ornate has no respiratory infection, so... why is he drooling? Has only happened twice, once today and once when I first got him.
I have read it is an aggression thing, if they are afraid or "angry" that they'll start salivating. Also, I noticed it happened today after being taken out for a check up, when put back in he ran around for a while and then it started.

Honestly I don't know though. What I do know is that it isn't a respiratory infection.

Any thoughts?

Enclosure is 6x4x32'', hot side 140-150f, mid enclosure is 85f, cool side 81f, humidity fluctuates from 60-80%

Never mind wrong species.

Didnt see your post just saw the edit so Im a bit confused lol

I was concerned about the temperature range because I was thinking ball python not a lizard.

I have noticed when my lizards get in a defensive mode they will salivate, its not a lot, but enough that you can tell liquid is coming out of their mouths.

Maybe just had a long drink of water before you checked?