Use a third part utility instead of using the one within Chrome itself:
Download and install Free Internet Window Washer:
http://www.eusing.com/Window_Washer/Window_Washer.htm
The first time you use it, click on 'Wash Settings'. Click the 'Browsers' tab and then on the 'Google Chrome' one. Put a tick against everything you want 'washed'.
Look through the other options as well and tick whatever you're happy to zap whenever you run the program. In particular, I suggest ensuring that you delete the Internet Explorer cache whenever you run FIWW, even if you never use Internet Explorer. That's because other Windows software shares that cache. For example, I stream a lot of radio programs using Windows Media Player and I recently found that there were over 20Gb of temporary files dumped in the IE cache.
Once you've got FIWW configured to your liking, run it periodically to zap anything you don't need. Then click on 'Test' to check that all the rubbish has disappeared.