You can use a hair dryer to heat it a little, and then it will be much more convenient to lift it. If it is broken, you can peel it off gently with your nails, and then if there is some glue left, you can use an eraser, but it will be very laborious, especially when the area is relatively large. You can also pour some water into the glue to soak it, or cover it with a napkin and treat it for half an hour. You can also use alcohol to wipe, and the effect is good. If it doesn't work, use gasoline, which is more powerful. The reason for not putting it in the first place is environmental protection, and I am afraid that gasoline will wash off the paint on the desktop. Gently wipe with a rag or socks dipped in gasoline.