My water-saving lavatory flush sticks down and WASTES water! The mechanism consists of a small button (press for brief flush) and a sort of half-moon button the side of it (press both for full flush). When I press the small button it gets stuck beneath the half-moon shaped button and has to be prised out to stop the water from running. How would I fix this please?

Thanks in advance for any help.

David.

Lift the lid. Place it on a flat surface upside down. Take WD-40 and gently spray it onto the interior part of the button. Make sure WD-40 covers entire button's mechanism. Work it in by pushing button repeatedly for about 10-20 seconds. Let me know how you did. Milo