Please follow the instructions below to replace the earpads:
To remove the earpad, you can simply pull the earpads out from the plastic housing. There are a few plastic clips on the inside perimeter which hold the earpads in place. Gently pull the earpad out until the whole earpad is removed.
To install your new earpads, you need to re-insert them under the plastic clips in the housing. First, position the earpad so that it matches the oval shape of the housing. Next, press the edge of the earpad firmly such that the earpad fits into place within the plastic clips. Work your way around the perimeter all of the clips are secure and the earpad is firmly in place. Now, you should be good to go!