There are many ways to clean the NokiaN8, some prefer water which may cause water damage while others just use a clean cloth. Although those are preferred ways and less effort is needed. There is another easy way to clean the Nokia N8 which only requires rubbingalcohol and a clean cloth, best not use cotton.
It depends on the user if they want to open the device and clean the parts that came out, you can clean the battery contacts but not the actual device motherboard as it will damage the device.
All you have to do is, wet the cloth with some rubbingalcohol and start cleaning the device even if it has a screen protector which can be bought from our store, click here to buy.