I use the freeware version of CCleaner (Clean & speed up your slow PC | CCleaner Official Website) weekly.

It removes everything that is in the cache as well as tracking cookies (good security).

It also remove passwords which are stored in your cache, For me these are for NT, a couple of newspapers and the BBC. Make sure that all such password- sensitive sites "know" what your passwords are when logging in again after running CCleaner. This has never been a problem for me on any of those sites.