/tmp Clean?

I have some problems with /tmp:

When /tmp is more 20-50% clean out /tmp directory :

rm -f /tmp/sess_*
rm -f /tmp/*.wrk

it cleans tmp folder, but size folder still big and 50% . I fix it :

Run the following commands :

/bin/umount -l /tmp
/bin/umount -l /var/tmp
/bin/rm -fv /usr/tmpDSK

/scripts/securetmp

and it's OK.

The partitions remount only helps to fix it. Is it problem the file system ext3 ? Is there a wey yet to fix /tmp ?

FC6
cPanel
tmpfs ext3=2 Gb.