Keyboard key only responds from middle/center presses

The "W" key on my laptop only responds when I press it directly on the center/middle of the key. It does not respond when pressed from the corners or the sides. The rest of my keys on my keyboard respond to side/corner presses. I know this is hardware issue so I already bought a new key but it is still unresponsive when I press the new key from the side/corner. I already cleaned out the dirt under the key. I'm thinking it has something to do with the rubber spring/cup but I'm not entirely sure since it looks fine. Is it possible to remove and replace the rubber spring/cup from a membrane keyboard?