Hope this fix might help someone else with a faulty one of these:
One of my smartlock remotes had been playing up for some time requiring a good tap to make it work. It finally stopped altogether and after a few hours of tracing the circuit under a magnifyer I found the microswitches no longer appeared in circuit. Initially I was able to fix this by GENTLEY pinching the four corners as illustrated (pliers shown on lower microswitch; points to squeeze gently shown with yellow arrows on the upper microswitch). However, this fix lasted only a few days. Further examination and testing showed the joints (shown with the red arrow on upper switch) on both switches were 'dry' or broken away and a quick application of a hot fine pointed soldering iron has fixed it. I assume pressing on the switches moves the switches slightly over the years causing these problems.
WARNINGS: Take the battery out of the remote before doing this; you don't want to short something and create a new problem. If you are not an experienced solderer find someone who is as this is a fiddley job and you want to be quick and accurate.
One of my smartlock remotes had been playing up for some time requiring a good tap to make it work. It finally stopped altogether and after a few hours of tracing the circuit under a magnifyer I found the microswitches no longer appeared in circuit. Initially I was able to fix this by GENTLEY pinching the four corners as illustrated (pliers shown on lower microswitch; points to squeeze gently shown with yellow arrows on the upper microswitch). However, this fix lasted only a few days. Further examination and testing showed the joints (shown with the red arrow on upper switch) on both switches were 'dry' or broken away and a quick application of a hot fine pointed soldering iron has fixed it. I assume pressing on the switches moves the switches slightly over the years causing these problems.

WARNINGS: Take the battery out of the remote before doing this; you don't want to short something and create a new problem. If you are not an experienced solderer find someone who is as this is a fiddley job and you want to be quick and accurate.