2013 Def leak

Hello all,

Noticed today that I had a couple wet spots behind the passenger rear tire, crawled under and looked at the def tank and there were some droplets on the tank. I have no error codes and I was able to see some of the crystalized def on the tank. Would you recommend taking it to a dealer or a shop or have any ideas? The car has roughly 74 thousand miles. I tried taking a picture of the dried def but hard to get the cell phone to take a good picture.

Thanks
Brent

Not much you can see on those without taking the bumper cover off. I have seen one that had a mouse chew through a DEF line.