Why do cartridges clog frequently with persistently high resistance?

Common triggers: 1) Wet, sticky dust that cannot be cleaned, forming hard cake; 2) Over-high filtration velocity causing deep media clogging; 3) Insufficient cleaning pressure or unreasonable pulse interval, incomplete cleaning; 4) High ambient humidity causing moisture adhesion; 5) Aged cartridges with clogged media. Solution: adjust conditions and optimize cleaning parameters; replace cartridges directly when caking is severe.