I just did this for the first time as well. Ps do this on a nice flat surface. First remove the two small metal screws inserted into the white plastic on the underside. Next get a small wrench and turn that octagon shaped metal washers counterclockwise that holds the bottom side of the button. Then you can push the button out. You need to remove the black plastic collar. You may need to push move that white plastic a bit to facilitate the removal. Then go in reverse to put back together. If you remove that bat sticker then have some goo gone to remove the residue and the wipe with soap/water. Good luck!!!!!