Answer:
You use me from your head to your toes. The more I work, the thinner I grow. What am I?
I am the word that is always spelled correctly by everyone.
You do not want me when you donβt have me, but when you have me you donβt want to lose me.
Sing me to a baby about to go to sleep.
I have three heads. Cut off one I become stronger. Cut off two I become ten.
I start with T end with T and within me is T.