Answer:
I have roots nobody sees. I am taller than trees. Up up I go but I never grow.
Six letters do my name compound; among the aged oft I'm found; The shepherd also by the brook hears me when Leaning on his crook; but in the middle me divide and take the half on either side each backward read a liquor tell ev'ry gay toper knows it well.
Why did the computer keep sneezing?
I am easy to see but no one likes looking at me. Without me there would be no you. I can make you complain or make you happy. But you almost always take me for-granted.
Keep doing me to avoid lens dryness
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.