Pneumatic Dual Flush Plate?

I too have had trouble with the pneumatic flush button - but my make is (I believe) Gelcast. In the space of 18months it has remained depressed twice. Huge loss of water, inconvenience and expense. Not helped by the fact that the workings within are very inaccessible. I fear I will have to bite the bullet and replace it - unless someone has a remedy.

Hoochpooch
February 2010