L.P.
Take a cotton ball or clean washcloth and wet it with plain water. Wipe the eye from the inside to the outside corners. Make sure you use a different cotton ball or different part of the washcloth for each eye. She may have blocked tear duct, which is pretty common. They usually clear up on their own, but it's important to keep them clean. One of my 4 had a tear duct that didn't clear up on it's own, and we had to take him to a specialist to have it unblocked. Don't hesitate to have your DD's Pedi check it out if you think it doesn't look right.
Best wishes :o)