Have you tried taking off the switch and cleaning the end of the battery tube that comes in contact with the spring? Mine got pretty scratched up and I found it sometimes didn't respond to clicks. Gave it a very light sand with some fine paper and ground a sharp spur off the spring and haven't had issues since.
Also get a small slot screwdriver and gently see if you can get the brass looking part of the switch to turn, if you can you need to tighten it.
As for the pill I have never had to touch that, but a pin or sewing needle looks like it'd work.