Yeah I ended up having Mobile Service come over and replace the fobLast week my wife washed my pants with my FOB still in it. Took the FOB and removed the battery and put the FOB in the warm desiccant dehumidifier I use for my hearing aid for about 4 days. Alas - to no avail - With a new battery does not operate the car. It does however still open the door and start the car when placed in the magic positions on the car.
After reading these articles, I think I will try placing the unit in my ultrasonic cleaner (assuming I can find it) with some alcohol and see if that cleans it up and makes it work. If not - Tesla Home Service is coming on Sunday morning to sell/program the new one (and reprogram the other FOB we have)
In the mean time - have to figure out how to get my phone to work as a key - or steal my wife's FOB (and get crushed each time when the seat moves forward...)