I've had my Centro for about a year, and the sync cable did not connect nearly as well as it used to. I keep my phone connected to my laptop most of the day at work so that it is always fully charged. Lately I would notice that it wasn't charging sometimes, so I would disconnect, try to clean the contacts, and reconnect. Sometimes it would work, sometimes not. The contacts on the phone are pretty difficult to clean.

Today I took a pushpin and ran it up and down each contact. It was just the right size to get to the contacts. Now they are much shinier, and the cable charges the Centro flawlessly again, just like when it was new.

Use this method at your own risk, but it worked great for me!