Windshield Washer System

[04X3]

So recently I found out that my rear windshield wiper washer didn't work. It seemed like it was blocked (which makes sense, since I have never used it since I didn't know it existed until a few days ago). I tried to spray fluid from the rear washer once yesterday to show my dad it was blocked so we could fix it. Now, the windshield washer reservoir seems to be leaking from somewhere. I filled it up 3 days ago and now its dry. There seem to be no leaks in the car but I haven't been in it long. What happened, and is it cheap to fix? Taking the car to the dealer for a small list of repairs, should I mention this or is it an easy fix myself?