Went swimming with it
My Grandson thought his peeble steel was water proof. Needless to say it wasn't.
no display, but back lite works. Took back off, it's dry, but no idea what I should try next, except go buy a new one.
I know you posted this ages ago, so please ignore if you've already addressed this.
The Pebble Steel is, per my understanding, waterproof to 5 ATM. I've swum several times while wearing mine and haven't had any issues. I'd get in touch with Pebble directly. Their return/repair process seems to be easy.
I owned a Pebble and own a Pebble Steel now, and i definitely went scuba-diving down to 25m with both models - and everything is still fine. So these things *are* waterproof...