If you are having a hard time snapping on GridMAX, you may want to make sure you’ve ordered the correct width GridMAX, to fit over your grid. Possible grid widths include 15/16-inch and 1-inch. GridMAX is available in both sizes. You may also want to check the grid for paint. This could be another cause to your problem. If the paint was sprayed on, you should have no problem snapping the GridMAX covers on. If the painted was rolled onto the grid, it may be too thick and prevent the covers from snapping on easily. If you currently have 15/16-inch grid and it has been painted using a roller and cannot get the 15/16-inch covers to snap over, you may want to consider trying 1-inch grid covers. If you have any doubt on what size to order, it is recommended to call and have a sample sent to you before you place your order.