2x6 inch 4 Pcs Static Cling Removable Reusable Indoor Dashcam in Use Vehicles In Car Camera Recording Warning Decals Labels Accessories for Rideshare Taxi Drivers The reason why the static sticker was dropped: 1. Because the surface is dusty or not clean, there is a lot of space inside which causes the static cling to fall off. 2. The surface is not mirrored or windshield, such as walls, frosted glass, etc., which are not mirrored, generally cannot be attached. Because electrostatic stickers need to be tightly attached, they must be mirrored.