As with peeling, older eggs make better meringues
You also have to be careful not to overbeat, as this can cause the protein structure in the egg white to break down, which iften leads to weepy meringues. another cause of weepy meringues in insufficient drying. Often caused by uneven heat in the oven, or a "wet" heat, like that of a gas oven.
If your oven temperature guide doesn't do below 100C, get a thermometer. I've had good results drying meringues for 4 or 5 hours at 75C