Do steam straighteners damage your hair?

I saw a few commercials advertising ionic steam straighteners, they say the steam doesn't hurt your hair at all. I'm not really sure though...Do steam straighteners damage your hair?
any extreme heat will damage ur hair no matter what the commercials or manufacturers say..thats why it is very important to use conditioners and moisturizers to minimize the damage that these things may cause...Do steam straighteners damage your hair?
IF YOUR HAIR IS WET THEN YES.IF IT IS DRY AND YOU LEAVE IT ON THERE FOR A LONG TIME. YES. BUT YOU NEED TO BE CAREFUL.
it hurt my hair, but some people have different results.
They are good for your hair.
no


but they are expensive


but the steam is like moisture so its good