How do you erase cache memory?
If you are using Windows 7, you can use the Command Prompt to clear the cache. Just summon the CMD and running it as an administrator, type in ipconfig /flushdns. Once entered, this should flush your DNS. For more details, visit http://www.addictivetips.com/windows-tips/clear-windows-7-cache/.
You can use a program like C Cleaner