How do you clean an oil pump?

If you want to clean your oil pump it's probably too late,you probably are having an oil starvation problem! suggestion-buy a new pump and strainer. these parts are relatively cheep,make sure the strainer is in correctly,including the angle-you want the strainer to suck oil not air. Also i suspect that you might be stretching out your oil changes.If this is so with a engine that normally runs hot the oil is getting baked. When oil gets baked,the oil turns to the equivalent to sand/very gritty. This grit will eventually clog the strainer of the oil pump. This starves the motor of oil- not good for the bearings.