@Peanutz,
Does the MB come with a cleaning cloth? I don't recall mine coming with one; need to open the box and check again ! But anyhow I use this Sony LCD Cleaning Liquid that came with my Sony LCD Monitor for my MBP screen - it works perfectly.

As for the keyboard, I use a keyboard protector and been told I could just wash the keyboard protector with water and soap [i've not made the effort to try this yet!]