I have had my Apple Watch about 6 months, each night I place it on the night stand to charge, and use as a very convenient night time clock, just touch it and time shows up. Just this past week at least once each night when I touch it nothing happens. My first thought was a power cut, but can see landing light is still on so not that. If I then give it a harder tap a message appears which I have been unable to read as the writing is small and appearance very brief 10 secs or so. ( If I tap it again the login screen appears or the daytime clock face) If I take it off the stand competely and replace it normal service is resumed. Any ideas why this change has come about?