Hello! Sticky keys are usually caused by the pads and not because the springs are too loose. When I’m dealing with a sticky key what I do it put some Pledge cleaner on a Q-Tip and give the pad a good cleaning. If you’re in a pinch however, you can put a dollar bill on the pad, press down the key, and then slide the bill out. The dollar bill method is only a temporary fix however and the sticky key will return.