Answer:
I am between earth and heaven. What am I?
I go inside boots and outside shoes.
I speak without a mouth and hear without ears. I have no body but I come alive with wind. What am I?
I describe a toilet cleaner as well as one of Santa's reindeer
I have four wings, but cannot fly, I never laugh and never cry; On the same spot Iām always found, toiling away with little sound. What am I?
No matter how little or how much you use me, you change me every month.