Condensation in apple watch

I've had my apple watch for about 3 weeks now. I love it. However, I've noticed a small patch of condensation near the sensors. I don't bathe with my watch. It doesn't even stay in the bathroom. I only wear it to work, during workouts, and day-to-day type stuff. I don't wear it tightly and there is enough space for my skin to breathe. I'm just wondering if anybody else has noticed any condensation too?