I have been in denial that Tresemme have discontinued their salon sleek smoothing serum as I had stocked up but now I need to find a replacement. I have tried others in the past and they either haven't worked or they've made my hair really oily. Please tell me about good ones - my hair is wavy but I straighten it and it has a tendency to frizz at the slightest sign of moisture. I have searched/looked and am totally bemused at the amount of stuff out there and have no idea what is good and what is not.