Was looking at the 10p screen cleaner from PC World recently but had none in stock, looked on ebay and came across Tablet and e-Reader cleaning kit, although not sure if good with Laptop / TV Screens, not sure why it wont??
Comes with a 125ml Cleaning liquid and Microfibre.
Its not 10p but searching on google, the cleaner shows up as £5.00+ @ Amazon / Ebuyer / Robery Dyas etc. Argos reviews shows good reviews with a few mentioning use on Mobiles.
Not sure if it can be used on laptop / tv's though, but cheaper than the other stockists!
Easily removes fingerprints
Non-streak formula for perfect results on screen
Anti-static reduces the risk of equipment damage
Minimal alcohol content - conains less the 1% alcohol
Free delivery also