The answer to 'sprinkler system bare spots' is that there are several common causes, including improper sprinkler coverage, soil compaction, and excessive foot traffic. Symptoms include dry, patchy grass and exposed soil in certain areas of your lawn. Solutions can include adjusting sprinkler heads, aerating the soil, and overseeding the bare spots.
If the issue is due to improper sprinkler coverage, you may be able to DIY by adjusting the angle and radius of the sprinkler heads. However, if the problem is more complex, such as poor drainage or significant soil compaction, it's best to call a professional landscaper or sprinkler technician to diagnose and resolve the issue properly.