Answer:
Keep doing me to avoid lens dryness
You do not want me when you don’t have me but when you have me you don't want to lose me.
I am the minerals vital for your good health.
What kind of dog keeps the best time?
I am a word. I become longer when the third letter is removed.
How can you add eight 6s together so that the total adds up to 750?
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic