Wet the window slightly - Wet microfibre to clean then a dry microfibre to polish
Who invent the microfibre they are fantastic - Great for frames and ewt else u want to clean
Could not agree more 
I have found the Vikan grey ones to be the best.
Alex where can i buy these vikan micros? I changed from scrim over to micros 6 months ago, first lot i bought was wcw own brand which i found fantastic.
Made another order with wcw a month ago and have been dissapointed this time, the guy i spoke to on the phone said they upgraded them but i explained to him the new ones were nowhere near as good as the old ones,hopefully they will sort this out but in the meantime would be happy to hear of other recomended suppliers