Come right up to the screen. Clo-o-oser!
[h/t Paul at Weird Universe]
Kids, with modern LED monitors, there's no longer a danger of x-rays, so come right up to the screen. Clo-o-oser! There's not enough static electricity on LED monitors to hold your magic window, but fortunately the modern LED screen is made of a special substance that wipes clean easily with any ammonia-based window cleaner, even if you use permanent-ink markers. Go ahead! Try it!