I too suffered the on and off blues to get my BT Mighty Mouse right click working. I permanently fixed my BT Mighty Mouse this way (been working for over a week without being turned off and still using the original batteries after five months):

1. Follow the steps for disassembling the MM on many of the web sites until you have the upper shell separated from the base. I found removing the bottom grey ring the easiest method.

2. Inside the upper shell you will see the plastic backed carbon traces used to detect the finger locations. In the centre of the upper shell is also a copper strip adhered to the shell. The plastic traces and the copper shim have a connection through a carbon dot on the shell where there are two holes next to a black carbon dot. I found that there were two issues with my MM that may have caused my issues. The first was that the plastic detectors were not fully adhered and flat on the inner shell. Then I found that the small carbon button which contacts the copper was not fully pressed down. I ran my finger over the entire internal surface of the shell to press down the adhesive bonded parts and then reassembled the mouse.

3. Instead of gluing the bottom grey ring back on the mouse, fit it in place with small sections of 3M invisible tape, over the grey ring and upper case, just in case things go awry again. If they're small enough, you won't see them when the mouse in operation and the case remains securely closed. Once you are sure you have no more problems then you can add a dab or two of superglue to permanently close the case at a later date or still have access to clean the scroll mechanism at a later time as well.

The other outcome might be that my disassembly and reassmbly reseated a poorly contacting cable(s) from the base the the upper shell. Either way, I have a fully functioning right click again in all situations. I have not had to remove the batteries in the mouse for over a week now whereas the power reset was becoming an hourly occurrence previously.

Cleaned the scroll wheel at the same time the case was apart. Cheers...

Zarbs

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