Hey guys, I have a 2011 Mazda CX-9 so when running the AC the water builds up and I have to put a wet vac to the drain plug underneath the car to unclog it, this has happened twice already, what can I do to fix this issue once and for all?

Any information would be greatly appreciated..

 

There should be a drain tube, not a drain plug. A blast of compressed air into the drain tube will blow out accumulated gunk that's clogging the tube.