There is one little section of grass that wasn't getting water and it was because the sprinkler was being covered by the neighbors creeping plant. I have a good relationship with my neighbors so I pop my head over the fence, and say:
me: Hey XXX...Do you mind if I trim back some of your plant over there [I point] about 5 inches so that the sprinkler can reach the grass?
her: That is okay. How are you? [random neighbor talk]
Today, I get home from work and see that she removed 95% of the plant and left the part that was covering the sprinkler! LOL. So now there's just dirt to replace her plants.
You have any interesting neighbor issues?