I had keratin treatment last summer, in order to control the ridiculous frizz rather than for straightening. It did a good job with the frizz but it had the effect of making my hair really gross and greasy. So much so that after a month I went back to using my old shampoo and therefore striped the keratin out. I just couldn't bear the feeling I'd been rubbing lard into my hair! I'm desperate to get the frizz sorted again. Is there some way of having the keratin treatment without the lasting 'ick'?