How can we clear ou computer deskop screen?

i have a leptop e want to know how can be clear out leplop screen, we should clear it by cloth or any other thing please tell?How can we clear ou computer deskop screen?
use a lcd cleener. its available in market. cost nearly 200 rupees.How can we clear ou computer deskop screen?
There are various kind of things available in the market but u can also do it with a tissue paper !!!!
delete everything

use of mensovit plustablet