Today I drove my P5 for the first time since Friday. It was painful, but looking outside and seeing the cold, salt, and snow, and then going down into the garage and looking at my perfectly clean Protege that I washed on Thursday when it was 65 or so, told me I was doing the right thing. Luckily the roads are clear and it isn't snowing so maybe I can get it back from class today without it getting too dirty in the process.
Yesterday I installed my Optima red top. Bam, just like that my headlights don't dim anymore. It was getting really bad, and I thought it was just due to the UDP. Now maybe I'll look into a grounding kit, the factory cables going to the battery look really wimpy.