As soon as the water becomes separated from your hand, it becomes tahir again.

As soon as the water becomes separated from your hand, it becomes tahir again. The Second purifying agent is the sun. * What are the najis things, that the sun can render tahir again? - It renders ground and buildings - apart from doors and other wooden material - straw rugs, not the strings used in making them, and bamboo mats tahir again. [Other things that are not covered are trees and their leaves, plantations, and fruits before they are picked, etc.].

* How does the sun render the floor and buildings tahir? - It does so by drying them up, provided that the actual najasah is removed. *