Perhaps this thread should be in the - Kindle - section?
Especially with the Kindle tech's explaination that the device has a different screen
chemistry.
As to cleaning the screens of my devices, I use this:
http://store.caig.com/s.nl/it.A/id.2583/.f
It comes with a microfiber cloth, and suggests that you spray the cloth not your
device.
Luck;
Ken