A couple of months after I bought my 2008 Cadillac CTS, I did a 1,000 mile oil change and realized as I was transferring my freshly washed oil change clothes to the dryer that my key fob got washed along with the clothes. The 2008 used a smart fob for keyless access, remote starting, and push button start inside the car so it was fairly sophisticated and although you can start the car with a dead fob battery using a special powered slot in the car, you cannot start it with a key so the basic "brains" of the fob have to be functional or you will be stranded.
I immediately removed the battery, flushed with WD-40, and then dried it before installing a new battery. It worked perfectly but for a couple of months I kept the second fob with me just to be safe. That washed fob was still fine when I traded the car in 6 years later requiring only a couple of replacement batteries over time.
I fully get the concern over reliability after an immersion incident and if doing commercial work I wouldn't use the recovered camera for other than a second body but for average consumer use it would be an acceptable risk to me.
Rodger
EOS 1DX M3, 1DX M2, 1DX, 5DS R, M6 Mark II, 1D M2, EOS 650 (film), many lenses, XF400 video
