How to clean /tmp/ folder contents on shutdown

sudo cp /etc/init.d/sysklogd /etc/init.d/sysklogd_backup
gksudo gedit /etc/init.d/sysklogd

* Find this section

...
stop)
log_begin_msg "Stopping system log daemon..."
start-stop-daemon --stop --quiet --oknodo --exec $binpath --pidfile $pidfile
log_end_msg $?
...

* Add the following line below it

rm -fr /tmp/* /tmp/.??*

NB:- tested on Dapper