I have been under my 2008 CX-9 three times in six months clearing the AC drain line. Using a shop vac failed all three times but using compressed air worked each time except on the last time is shorted my blower fan and I had to replace it. Now it is sloshing again and I need a permanent fix. I am guessing something is floating in the water and plugging up the drain hole. Compressed air blows it away but it eventually covers the drain again. Any help to fix this permanently or at least where it will take another 12 years to do it again like the first time.