This is a bit outside the box, but do you think it could be stray current causing the twitching?
Have you ever measured or tested for that? The easiest way to do it (especially In the winter) is to stick a finger with a small cut on it in your tank. If there's even the smallest amount of current, you'll feel a small sting.
You could also use a volt meter, but not every one has that and if your home is older, it may not have grounded outlets, which you need to test it properly.
Just a thought.
When you say hunger strikes, how long are we talking?
Have you ever measured or tested for that? The easiest way to do it (especially In the winter) is to stick a finger with a small cut on it in your tank. If there's even the smallest amount of current, you'll feel a small sting.
You could also use a volt meter, but not every one has that and if your home is older, it may not have grounded outlets, which you need to test it properly.
Just a thought.
When you say hunger strikes, how long are we talking?