had a similar experience
a copper tool, with a nice button that works fine… its my favorite AAA
then a
TiTool, with a spongy and hard to press button
I fixed it by taking the switch out,
and giving it a serious talking to
so it understands I mean business,
then I put it back together.
After that, it was afraid of me, and respects that Im the Alpha Dog in charge here,
it has worked great ever since.
I think it also helped that I found the rubber button was not properly seated before my interrogation. That situation was remedied upon reassembly.