Today I decided to give my laptop a spring clean. I used a slightly wet towel to clean the screen and keyboard. As I was cleaning the laptop it was still on and I was pressing a lot of keys. I then noticed that none of the letters were working. Numbers and symbols still work. This suggests that instead of water damage I must have changed some settings using the keyboard. I then thought that restarting the computer might sort the issue. I've now realised that as the keyboard doesn't work I now can't log into the computer which means I can't get to system preferences to change things back. Is there anyone out there that can help?
Just let it dry first before you try anything more. At least 24 hours, even more if you can. If you have a large bag of rice - yes, rice, - put the key board in the bag and leave it over-night. Uncooked rice is an excellent dessicant.