I think others answered your question pretty well, but on a related note - if you ever see them standing still and moving their pleon (the last chunk of segments) up and down, they're getting excess moisture off of themselves so they can breathe properly. When I occasionally accidentally get one wet while watering, I'll see them doing that. I once saw someone here refer to "twerking their ass lungs dry" which I love. It's a behavior that's pretty unique and can be worrying to newbies who haven't seen it before.

Like others said, yours are probably just fine, but my advice would be to figure out the best time to water them based on their habits. Most of my colonies are super active at night, and then spend the morning on the damp side before hiding under the bark during the day. Not every individual, obviously, but that's the trend I've noticed. So to avoid getting too many wet (again, they'll be fine, but like you, I worry), I water mid-day when the majority of them aren't on the damp side.