Yeah, the "don't soak it rule" isn't because it will explode if it's underwater for long, just that there are inevitably gaps and it doesn't do you any good. J

Yeah, the "don't soak it rule" isn't because it will explode if it's underwater for long, just that there are inevitably gaps and it doesn't do you any good. Just get it in there, have a good scrub, and rinse off.