I also got one...he has never went on the glass. Maybe it is because your sand bed is fairly new, and you don't have enough for him to eat. Maybe that is why he is on the glass, searching for food. They sift the sand looking for food. I have a 4-5 inch bed in my tank, and in some spots it is actually more like 6-7 inches deep. It is 125 gallon tank with lots of life in the sand, so that may be why mine doesn't climb the glass. Maybe....?????
125 Gal-35 Gal Wet/Dry-Tetra-Tec PF500 HOB
(3) AuquaClear 301 Powerheads-600 GPH
Automatic Tempature Controller
5-6 Inch Sand Bed-200+ lbs of LR