Clean chroot manually

I mess around schroot, chroot and mkschroot( https://github.com/KayEss/mkschroot ). Done something with blind but do not want to remove them with blind So!!! thank for link at the page's bottom. The instruction below are what I have done for remove unwanted chroot.

1. Check mounted sys by
    >> df -ah
    * you will see chroot mount path.

2. Goto /var/lib/schroot
    - remove your's chroot inside session's dir
    - do unmount proc sys dev/pts dev tmp in your's chroot from mount's dir
    * I'd use
    >> for f in proc sys dev/pts dev tmp;do sudo umount $f;done;
    - do unmount your's chroot
   
thank for http://manpages.ubuntu.com/manpages/natty/man7/schroot-faq.7.html

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