Yea that condensation is insidious, it gets everywhere. I started using the stuff from the boat stores. It comes in small tubs, about the size of the small cream cheese tubs. I leave one under the clam shell near the A.I.R. pump and another near the battery/break master/ cam cover and another on the other cam cover near the HVAC stuff, and another up on the overflow tank. I also open up all the compartments & take my stuff home before I deploy three inside the passenger area. One each foot well and one in the back deck area.
I hate to say this part. So I'll just toss it out. The first thing that I did in 12/04 when I got the car was to get every connector and ground eyelet I could find in the engine room and: take them apart, clean w/contact cleaner & light sand paper on the ground "eyes". Then using some dielectric grease put all the ground eyes back in place. The connectors were a bit more tedious. Unplug, paper towel soaked w/contact cleaner enemas
, remove the corrigated rubber gaskets & rub dielectric on them and put some dielectric into the terminals of each side of the connectors. My car came to me from a climate controlled garage...it's owner built houses for a living, so his house had all the good stuff!