Wetness around eyes?

I have a 4 year old chinchilla named Penelope, and the past few days I have noticed that she seems to have wetness around her eyes, almost as though she's been tearing up or something. However, she is still acting fine and perfectly normal, jumping around and running on her wheel and wanting lots of attention, and she's eating and drinking and eating her hay fine, so? I'm just concerned, because this has never happened before. Any thoughts, please and thank you?