Hacker help: How do I silence the Lottorp Clock?

Materials: Lottorp Clock

Description: Found this handy little clock at Ikea (Malaysia) but it makes an annoying, loud beep when you change the function or press the buttons. Have tried to cover the speaker hole but sound is not reduced in the least. Has anyone tried to silence one of these clocks? Have not figured out how to take it apart to disconnect the speaker. Of course, this will render the alarm useless.

Thoughts or suggestions appreciated.

~ Chris Egan, KL, Malaysia