My wife has told me that there is small amounts of water coming from inside the dash and collecting on the front passenger floor mat. She also hears a sound similar to sand (not water) sliding when she turns corners.
It's a 2013 Elantra GT.
Has anyone heard of this issue?

 

Hi, take to dealership. My Elantra did the same thing went to dealership it was condensation tube was clogged.