John,
I have a similar issue with new switches. I can get a signal (the switch responds) when I hold my hand over the switch. I have tried the wire to house ground trick but it did not work. I have 38 switches on my layout and only about 5 are having this issue and they are scattered across my layout. Looking to see about purchasing that Legacy Signal Booster I read about or perhaps there is something I can do or add to the switch itself to improve the signal. My email is wbuisch@yahoo.com if you would like to take this conversation offline.
Thanks in advance!
Bill