If you experience moisture pooling between your lemon meringue filling and the meringue itself (otherwise known as “weeping”), that is likely to have happened as a result of you adding your meringue topping after the filling had cooled instead of doing so when the filling was still hot. You must add your meringue topping while the filling is still hot as it will help to cook the meringue from the bottom side which will then prevent any moisture from getting in between the two layers and causing a watery pie. If weeping does occur, don’t worry. Your pie isn’t a write-off. In fact, it will still taste just as delicious!