I can't just blame the religious preachers, the tunnel vision syndrome is experienced by any logician every now and then. I told you what I meant by "cause" when I said not everything has a cause, but you keep insisting on your definition of cause (water for water vapor). You want me to fit my answer per your definition.
Fine, let's do that. You said water is the cause of water vapor? Now what does you religious book say behind the cause of water? Maybe you will skip H2 and O part and jump right into atoms. Fine, what's the cause of atom? God? What's the cause of God? There, an object without a cause, (definition of cause per your POV), is God.