Kim,
Pop into PC world and try some "storex screen cleaning tissues" for £4.99 for a 100 or there abouts, which are for TFT screens.
When cleaning the screen use 5 or 6 cloths, it will look damp to begin with, but should evaporate quickly.
Also do not rub hard or put pressure onto the screen when cleaning as they touch sensitive.
Just for the record, the cleaning solution that the manufacturers use to clean screens before they leave the factory is "rubbing alcohol"
let us know how you get on!
good luck
keith