1. Misaligned heads: If any sprinkler heads are watering the street, patio, sidewalk or driveway, they've probably shifted from their original position and require a simple adjustment.

2. Obstructed heads: Taller grass around sprinkler heads may block your intended spray pattern and prevent water from reaching your lawn or other plants. Make sure you have at least 3- or 4-inch pop-up sprinklers to fully clear taller grass.  You may also need to trim back overgrown plant material that could block the spray.

3. Broken parts: Sprinkler parts can sometimes be broken by lawnmowers or foot traffic. Replace any broken parts, being sure to match the spray pattern and distance for peak performance.

4. Clogged nozzles: Dirt, small rocks or other debris can occasionally clog sprinkler heads. Clogged heads will need to be cleaned. For do-it-yourselfers, this involves turning off the zone, unscrewing the nozzle and then rinsing the nozzle and filter screen in some clean water. Once cleared, the nozzle and filter screen should be put back into place, checking to make sure the spray is aligned properly.

5. Head-to-head coverage: For even, efficient watering, each sprinkler's spray should just reach the next sprinkler head. Under-spray may result in dry spots that can eventually turn brown, while over-spray wastes water. A simple adjustment should take care of this problem.