I've been wearing the 42mm Sport for the past week. Today, I put on the 38mm SS, which had been sitting on my desk. To my surprise, the Digital Crown was sticky and to some extent stuck. I found this to be odd as I haven't done anything that would lead to debris finding its way into the watch. What's more odd is the fix from Apple's own support document. Turn off your Apple Watch and remove it from the charger. If you have a leather band, remove it from your Apple Watch. Hold the Digital Crown under lightly running, warm, fresh water from a faucet for 10 to 15 seconds. Soaps and other cleaning products shouldn't be used. Continuously turn and press the Digital Crown as water runs over the small gap between the crown and the housing. Dry your Apple Watch with a non-abrasive, lint-free cleaning cloth. So there you have it. If you too suffer from a sticky Digital Crown, don't hesitate to run it under warm water for 10-15 seconds. I say this as someone who hasn't put my Apple Watches near water.