My Performer is older, so it doesn't have the removable timer. However, it looks like you need to push up on it a little, then swing the bottom portion out to remove. If it's binding somewhere, you might be able to see a wear spot in the plastic after removing and replacing it a few times. Then, you can try a little sandpaper on both the timer and the frame area (if accessible) to see if it loosens up. Also, check for packaging remnants that might have gotten inside the housing that could be stuck in there and creating the issue. Otherwise, test Weber's legendary customer service by giving them a call. They may just offer to send you a new part. Let us know if they're still maintaining their reputation.