OK, I will check the air filter, but how will that help water run out the bottom!

Seriously, I figured that the filter is only in play when you are taking in fresh air. I have odor in the max or fresh position, and combined with the lack of condsensation coming out figure I have something growing in the evaporator case.
So, based on replys it looks like the tube is the drain. To restate the question, anybody had any success cleaning it?
Hey Moderator, I don't mind my post being moved when appropriate, but how do you figure a question on the location of the evaporator drian belongs in Duratech Maintenace? It has absolutely nothing to do with (A) Maintenance, and (B) what engine the car has. It is a question about the BODY. How GENERAL can you get?