Can't help you on removal, but the same thing happend to me a few years ago. Heavy rain storm in SC, full top on and windows closed and the ECU got wet somehow (vents were closed too). It required a new ECU which was around $1600 if I remember. Can't complain though, that's the only time in 13 years the old girl has failed me
I am sure someone here can help you get it out. Good luck Robert.