At the end of the irrigation season, the system should be operated with 0.03% HNO3 (Nitric Acid) to ensure cleanliness and HCL (Hydrochloric Acid) or H2SO4 (Sulfuric Acid) should not be used to prevent blockages in the system. The system should be operated with only water for 10-15 minutes in order to empty the manure and give it to the soil completely.