The Logitech sticker at the bottom of the mouse is very heat sensitive and crumbles easily. In case you want to keep that sticker intact apply as little heat as possible and remove the sticker carefully.

If you don't want to remove the sticker all the way, you can puncture it with a screwdriver where the two screws are located beneath it. Use this picture to make sure you're hitting the right spots.

Heat an iOpener and apply it to the Logitech sticker to loosen its adhesive.