What's an undemanding track to steal away the smudges on a laptop computer peak?

Answer:

never use any solvents...use a totally soft rag...or better all the same a microfiber and dampen it insubstantially with reheat water...ring it well brought-up and clean away!
Use a kind wipe. You need one next to some cleaning power, so something like the "Baby Bottom wipes" that WALMART sell for a couple of dollars is fine.

Alternatively, a SMALL bit of windex sprayed on the screen, and used favourably on the screen will also verbs very economically.
Use a 50/50 mixture of isopropyl(rubbing alcohol) and distilled water (not touch water, minerals are bad). I use a cotton globe or lint free cloth to clean, next wipe the excess with a dry lint free cloth. Do not use windex or anything beside ammonia.
Brillo Pad or some ChoreBoy if you are in the ghetto.