Answer:
I am an insect and the first part of my name is the name of another insect. What am I?
When you stop and look you can always see me. If you try to touch you cannot feel me. I cannot move but as you near me I will move away from you.
I begin with the letter āiā, if you add āaā in front of me, I become a new word with a different meaning, but still sounds exactly the same. What word am I?
I am an odd number. Take away a letter and I become even. What number am I?
I am the reaction after enjoying soda.
No matter how little or how much you use me, you change me every month.