What are the most common causes of clogged nozzles and sprinkler heads in lawn irrigation systems?

Clogged nozzles and sprinkler heads are often caused by debris, dirt, and mineral deposits that accumulate over time. Debris can include grass clippings, leaves, and other organic matter, while mineral deposits can come from hard water or chemical treatments. Additionally, worn-out or damaged nozzles and sprinkler heads can also lead to clogging. Regular cleaning and maintenance can help prevent these issues.