People can quickly become accustomed to little noises and hiccups that happen in many aspects of their life. Their house might creak and they soon come to ignore it. Their garage door might make a little noise and they ignore that, as well. As long as everything is working, people tend not to think about those noises with the garage door, as long as they are small sounds. If they have a car that makes noise, people tend to take it into the shop for a checkup and tune-up, though, even when it seems to be running fine.