Answer:
What cleans as it gets dirty only to get clean the more you use it?
What goes up when rain comes down?
If the day before yesterday is the 23rd, then what is the day after tomorrow.
What is as light as a feather, but not even the strongest man on earth can't hold it for more than 1 c)minute?
What occurs four times in every week, twice in every month, only once in a year but never in a day?
Why did the stadium get so hot after the game?