Regular cleaning after every use. After each day it is essential to flush the hoses and Spraywand with Water. You will help prevent chemical build-up that can clog lines and nozzles. Leaving chemicals inside the spraywand, hoses, and tanks can cause a clog and damage the system. This is misconduct/misuse and voids the warranty. Depending on the model of your ESS Sprayer, it may have air filters or liquid strainers that need to be cleaned or replaced periodically.