The other day the mischievous Clarence swatted one of his squeaky cat toys into his water dish, causing the mouse's internal squeaker speaker to chirp without ceasing. Thinking that perhaps it just needed to be dried out, I tossed it in the dryer for 20 minutes. It was dry, but it still squeaked.
I stuck it in the fridge, then the pantry, just to get it out of earshot. No luck: I could still hear its high-pitched chirps.
I put it outside, but then it started to rain, which I feared would be counterproductive.
Finally I stashed it in the freezer overnight. The next day, mercifully, it was back to normal, chirping only when Clarence batted it around.
Pretty sturdy technology for a cat toy!