My car seat has been bothering my back a long time. It leans to the right and is making my spine ache on long drives. But one day last week I discovered that if I pulled the little underseat thingey that made it go forwards and back, I could also make one side of it turn to the left or right just enough to be comfortable.
I'm ashamed to admit that it is an old Saturn and I won't tell how many years I've had it and thought I knew it well.