Toyota Camry 2010 LE

Toyota Camry 2010 LE.
I (or one of my kids) may have dropped something small possibly through the windshield vent or other vent and now every time I make a turn either way, I can hear the piece rolling back & forth somewhere under the steering wheel column. The resulting noise is getting very annoying. The car is still under warranty. Is there anyway I can access the duct (assuming that where it dropped) to get the thing out? Or should I go to the Toyota dealer for this sort of issue. I would really appreciate some help. Thanks in advance.
Sal