Normally the top (convex) side does not even get moist. I discover that floating the bridge concave aspect down for an hour or so typically straightens it, but I typically clamp it to the flat floor to dry right away. The sleek structure can be produced to overcome any splashes. https://allhealthmarket.com/product/new-arrivals/wellness-as-seen-on-tv/anti-snoring-chin-straps-mouth-guard-stop-bruxism-anti-ronquidos-nose-snoring-solutions-breathing-snore-stopper-for-sleeping/