A chalkboard/blackboard
There is nothing 'whiter than white', because white is already as white as it gets.
It gets whiter and thicker when you ovulate.
It works because it has small microorganisms (microbe) that kill germs that make it Dirty and after using it the cloth will get whiter. So the strong ones that makes it white has lots of it.
Life Gets You Dirty was created on 1999-10-12.
Blackboard
it is usually gray when wet and for the first few years then it gets whiter with age
Given time everything gets dirty.
If the hamsters feet are dirty when it gets on it.
Comparative: Whiter Superlative: Whitest
A leather shoe
It is only if your room has too much stuff in it that it gets dirty!