It's funny I see this thread this morning.

My watch runs on solar power. I keep it in a well lit area and it has always been perfect, to the second.

Every watch I ever had I had problems with, so I paid quite a bit for this one so I would have a good one.

Well, about two weeks ago , I started noticing the time was always screwed up. Then it runs great for a day or two and I pick it up again . Hours off. It's really strange.

Now, it's every other day. Baffled by it.