I've been having some issues with my garage door lately—it's been making strange noises and doesn't open as smoothly as it used to. I'm considering hiring a professional to take a look at it, but I'm not sure where to start. What should I look for in a reliable garage door repair service? Are there specific certifications or qualifications I should be aware of? Also, how often should regular maintenance be performed to keep the door in good working condition? Any advice would be greatly appreciated!