Sounds like your optispark is filled with alot of moisture.
rule 1 is never do the underbody power wash at a car wash, you just learned the hard way.
You can try all the things that have been tried before, dry it out, take it off and clean it up and reintsall, etc etc. But you will end up replacing the optispark sooner that later.
Do your research on them, the ones from jegs and summit are crap, most of the eBay ones are crap (except maybe the chandler ones) and oem ones run around 500.
rule 1 is never do the underbody power wash at a car wash, you just learned the hard way.
You can try all the things that have been tried before, dry it out, take it off and clean it up and reintsall, etc etc. But you will end up replacing the optispark sooner that later.
Do your research on them, the ones from jegs and summit are crap, most of the eBay ones are crap (except maybe the chandler ones) and oem ones run around 500.