Quoted from LOTR_breath:
OK, elevator not perfect but much better now. I realized that the upkicker solenoid is not on the elevator itself but mounted on the bottom of the playfield. I took that assy off, took it apart, cleaned the plunger and sleeve, put it all back together. Now the upkick to the throne works about 90% of the time, and the upkick to the mini playfield sometimes takes two attempts. I can live with that!
You shouldn't have to live with that. I think a lot of people are simply accepting these issues and not reporting them thus giving Stern a pass, but hey after six warranty work orders I am willing to live with too.