I bought a Diamondback Response XE from Dicks about 6 months ago. It always had a small noise coming from the front wheel with every tire rotation, and the person working at Dicks said it was just the disc brake pad. He said it would wear out within a few rides, but it didn't. Today, I opened the quick release hub and closed it, and now whenever I tighten the hub, it makes a bad scraping sound. It does not seem to be the brake pad. How should I go about fixing this? At this point, I would not mind getting back to the noise I had before, as it was not as loud as this noise.

Thanks