I also found this solution online:
"sounds like you're having the same problem and i just found the cure last night. inside the engine compartment behind the exhaust manifold there is a little flap on the firewall shield. its a little left of center looking in the engine and a little more than halfway down. open that flap and then there'll be a rubber flap. lift that flap and watch the water gush out! not sure why mine wasn't leaking, didn't appear to be clogged. so i may have to do this every couple of days to make sure all the water is out."
Might be worth a try as well, I saw a video about it earlier today