So I got a p0440 code and so far I've eliminated the seal around the tank, the gas cap, the evap sensor on the engine.

crawled under the truck just not and I see liquid on my canister coming from the top connection it looks like. It isn't gas to what I can smell(haven' tastes it either). I' wondering what other then gas goes in there. I've also seen a us so of a guy taking it off and shooting air threw it.

My question to that is will it damage anything that way?

 

Heres what my cheapy code reader says
And the run test