you need to have it flushed
The walls of a radiator get dirty from the roads. This can be washed.
it is dirty
to clean dirty water it needs to be cleaned or filtered
one is clean and the other dirty??
Blackboard
Well If you clean the clean dishes first Then if you clean the dirty dishes first the chance of the clean ones getting dirty. Hope this helps!
dirty
The antonyms of dirty is clean
Dirty
The principle is 'dilution': with the first addition of clean water to dirty water, the dirty water becomes less dirty because it is diluted by the clean water. With the continued addition of clean water to dirty water, eventually the dirty water will be completely diluted and there will be no dirty water left; it will all be replaced by clean water.
Clean
dirty it takes 40 + days to be clean