I'm not sure exactly what sort of lube you are talking about, but to the best of my knowledge, there shouldn't be any thing visible in your TB or manifold as far as dirt.

As was already said, get some carb/tb cleaner somewhere, and blast your tb when it's closed and the car is off, then clean it off with a rag. If you want to get really nutty, you can take off your manifold to make sure it's clean. Supposedly this will also help flow, although from what I understand it's more preventative maintenence than anything else.

Good Luck,
Aj