Don't waste your time dropping it off at the dealership. Stop by a local repair shop and ask them to blow out the A/C drain line. If you have a jack you can do it your self with something like a can of WD40 with the red plastic tube on it.
Stick the tube up the hose and give it a short blast.
174,000+ miles, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. Also CHECK YOUR OIL, these cars use it.