Only had mine a week or so and have been wearing it in the steam room and the sauna at the gym. Anyone else do this or will it cause issues?
Don't chance taking your Apple watch in the steam room! Had my Apple Watch 2 for about 15 months, and I have never taken it in the pool, or shower, or steam room - until last week. I took a one minute shower, a 15 minute steam bath, and back into the shower for three minutes. About 24 hours later, the display started acting funny and swiping anything on the watch face was an exercise of frustration. Then later that night, there was an orange-reddish glow in the background of the watch (see pic), which all attempts to correct were futile. A reset to factory settings, and re-sync the watch failed to fix the problem. I turned it off, put it on the charger for a few hours, and tried again. This time all my screen would show was a purple background with a blue line across (see pic), then after two minutes, the watch went black, and it became an expensive mini-paperweight.
I took it to the Genius Bar (I'm fortunate to have an Apple store five minutes from my house), and none of the techs had seen this issue before. One had seen it with an iPhone, but never a watch. They don't repair Apple Watches apparently, they only replace, so I am now a proud owner of a new Apple Watch 2 for $300.
My guess is the heat from the steam room visit may have caused expansion around the water seals, and steam got in, or the seals were still expanded when I hit the shower, and water got in. I can't be for sure, as the tech said my watch won't be taken apart as it was out of warranty.
Anyways, to answer the original question, NO I would not chance taking it in the steam room or sauna.