The best thing to do here is to find silica gel or a dessicant which you can find inside new shoes or bags. If you can't find any, you can go to a supermarket and buy a pack of rice crackers. I knew One One Rice Crackers had a large pack of dessicant inside. That's the one on the left below. I found the one on the right from a Case Logic bag. Just pack these together with the electronic component of the car key in plastic bag. Seal it and leave it alone for at least 2 days. The objective here is to remove all moisture from the electronics. My key worked again after this. I am still keeping the key with the silica gel bags at least for the week to be sure. Hope this helps.
|Silica gel or dessicant from shoes, bags or rice crackers.|