Good Riddles

Question: Those who make this item, don't use it. Those who BUY this item, have no need for it. But those who USE this item, never see it. What is the item?

Question: A grandfather has a broken grandfather clock that is off by a minute every hour (too fast). He figures out a way, while keeping it running at the same rate, to make the clock say the correct time twice a day.

How could he do this?

Question: Every night I'm told what to do,
and each morning I do what I'm told.
But I still don't escape your scold.

What am I?

Question: How can "L" be greater in size than "XL"?

Question: What is the difference between a dollar and a half and thirty five-cents?