I have noticed that after I uninstall a package from my system the hidden files in my home directory are still there. For example I used to have an application called proxychains installed. But then after I uninstalled it with the Ubuntu Software Center there was still a .proxychains folder in my home folder. Is there a way to remove all these files? Also are they stored anywhere else except home? I ask because I would like to clean up my system and I am O.K. with reconfiguring my applications if I do decide to install them at a later date.