This isn't the cleanest way to select layers, because under certain circumstances the layers could be a little bit rough around the edges by using the magic wand.I'm using photoshop and had the same problem with the glass. The easy explanation that fixed it is, use the magic wand tool on the text/number layers to select just the numbers and letters......
The best way (i know) to select layers is to simply hold the CTRL key and leftclick on the layer symbol. The shape of the mouse cursor changes while holding CTRL.
You can combine it with holding the SHIFT key to select more than one layer at once.