I pull and clean mine whenever I change the oil. But the nice thing is if the oil pressure starts to act stupid, or you hear a noise, real easy to pull it off and look. I had a guy one time with a pulling truck engine, it was blowing up regularly at about every ten hooks. I told the guy it is pretty hard to diagnose root cause of a failure when rods are hanging out the block and pistons are in the oil pan. Pulling truck engines are spun really tight. So I had him install a system one filter and told him check the screen after every pull. 8th hook it had metal in it. Pulled it apart and the tri-metal main bearings were flaking material. Installed King bearings that are not tri-metal and the engine has held together for a couple years now.