To work with BleachBit is very simple. The program window is divided into two parts. On the left displays a tree list of what can be cleaned. Right for more information. When you click on any of the items you can read about that will be removed. After you have selected the items to delete, you can press the Preview button and see what files will be deleted many files and their size. To start the uninstallation process, you must click Clear.
BleachBit can be run with root privileges. When the program starts immediately prompted for a password, it is very convenient.
Installation into Linux Mint:
Installation of the standard repository
sudo apt install bleachbit
Install the latest version from the official site
1. Download DEB package from here http://bleachbit.sourceforge.net/download/linux (I have Linux Mint 17.3 now and I chose the package for Linux Mint
2. Install it