That sounds like the same way I sleep. I used the Watch 8 Classic for 2 months before switching to the 2025 Ultra, and it was in perfect condition when I gave it to my dad.
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Unless you are sleeping in a gravel bed, there is nothing you can do in sleep that will damage your watch. But, if you are iffy about it, you can add a screen protector. Normal pressure from your body or head will also not cause any damage,
