The Etheric Body is the first or lowest layer in the "human energy field" or aura. It is important that you "clean" your etheric body because helps you to liberate you from negative energies.
There are many techniques for Etheric body clearing, but here i have you a easy one.
When you go to take a bath, make at end of bath to spill much water through two of your arms for enough time that you feel good. First start with one arm and then with other.