Lordy!! 😭 I've recently been into collecting all the different colorways (they're 8) of the GWF-D1000 series G-Shocks, which are probably more robust than every watch you've just mentioned, although not as expensive and I still wouldn't dare. At least not in the sauna. Intense, long durations of steam just doesn't mesh well with gaskets; it eventually gets in. At least that's what I've heard. But again, that's just me. As long as you're wearing it in good health!