I have been driving in the rain on my motorcycle this weekend. My Nokia 920 was stored in one of the pockets on the outside of my backpack. The phone felt a bit humid, but not really wet.
At home, I took the phone out and it felt warm, as if the battery was heating up. Soon I found out after booting the phone that the touchscreen did not function at all. After reading about soft and hard resets, I did this many times, but without any success.
All other functions seemed to work. Even by pressing the camera button I could stil take pictures. So this afternoon I went to youtube to look for some help. I saw how to dismantle the phone. I thought, if I do not try something I have to buy a new phone anyway,
so I followed the instructions up to how to take the battery out. I was doing this outside the house, it was sunny and warm. I carefully took a napkin to 'dry' all these miniature connection plugs inside the phone (so all the contectors that I touched when
dismantling the phone), and I reassembled the phone again, put the simcard back in, and did a hard reset (press soundkey, on/off key, camerakey all at the same time and wait until the phone starts trembling, indicating that the hard reset has been activated/completed).
l the phone switched on and the touchscreen was working again!!!
You do need to buy a couple of Torx screw drivers (the youtube video said), but I only used 1 single Torx screw drive to take 2 (outside) and 1 inside screw out. So if you want to repeat what I did (get the battery out and disconnect it from the phone, clean/dry
the connections, and reassemble), 1 Torx screw driver will do.
If this helps one of you, I am already happy. All the best.