Hi - I'm trying to help my little boy with his Tamagotchi. His battery wore out and we bought a new one (careful to buy the one listed on the back) and replaced it. We then pushed the reset button. It's now been almost a day and while we see an egg on the screen, it hasn't hatched. I believe the instructions say that it should hatch within 5 minutes of a reset. The egg is on screen and moving up and down and we have tried pressing the reset a couple of times since, but no luck. Can anyone help? Thanks