Hi E.~
After our son was sick for the second winter in a row (he's fine in the summer), the ped said he had fluid in his ears but it wasn't an infection...same as yours. It CAN get infected, though, so it does need to be watched. Per the doc, fluid behind the eardrum can damage hearing if left untreated for a long time. I wouldn't worry, though. Now that your doc knows it's there, they will check to be sure it dries up. Please, please don't use any 'home remedies' or watered down doses of adult meds (Im sure you wouldn't) :) to dry it up. There is no way to access the inner ear from the outside unless the eardrum is ruptured, so they won't do any good anyway! You should make sure she has follow up visits scheduled to be certain that it gets better...it will also help you catch an infection early, since it will be hard to tell while she is already pulling at her ears. Good luck! Plenty of kisses and hugs and cuddles will help her temporarily forget those teeth!!
~L.