defect-reporting

What's the most effective way of reporting defect rates back to the developer teams?

We are currently reporting defect totals back to the development teams on a daily basis. We also track the usual defect metrics, namely: time to detect a defect, and time to fix a defect. Unfortunately, the teams don't seem to really care if they have the highest defect rates. Or possibly even care about their defect rates at all. I...