Pin popping out

Question

I have a titanium Fossil Blue watch that I have had for roughly 2 years. Recently for some reason the pin keeps popping out stopping the watch. I can reset the time and push the pin back in and it takes right off. It happens at random, sometimes a few hours, sometimes a few minutes. This watch is still like brand new and wasn't cheap so I don't feel like I should have to buy a new one. The numbers on the back say TI-5067 with 260410 under that.