Front Cover Detached - Mesh Pocket

Hi. I have had a couple of the mesh pocket devices for a number of months. However, on one of them the front faceplate has detached from the body. I see that it originally was held in place by a couple of sticky pads. Which have no lost their stickiness.
Any suggestions with how to re - attach specifically which kind of sticky pads and or what to use to remove the original pads?