Jes,
Previously I allowed my maid to hold her HP. But like you... I found out that they cannot be trusted to know their limits. They will end up talking and sms-ing all thru the day. And then the work all not done. Even if done, it's slip shod work. So now, I hold my new maid's HP. Morning she will hand to me. Then at night I will return her after all the work is done.
Yah... dunno wat these maids want. Since you decided to send her back to agent liaoz, then make sure you find out the 'penalties' you need to pay - as in her food & lodging charges till she finds new job, the maid levy is still charged to you, etc. Also, as her WP is still under your name, are you able to get new maid? Good luck. Maids are both a boon and bane in our lives. *sigh*