Highlighted hair a bit frizzy/flyaway what to use?

[GonnaGetGoingReturns]

So I'm 50, with highlighted long blonde straight/wavy hair which I deep condition (with a mask) once or twice a week and after washing as a bit damaged (but hairdresser says it's not that damaged now) I use a leave in conditioner and serum/smoothing cream. I always use shampoo/conditioner for coloured hair, professional brands.

Have noticed recently it's a bit flyaway (not really frizzy but maybe sort of). What could I do to make it straighter and smoother? Is it the summer heat?

I don't get on with Olaplex and hairdresser doesn't recommend it anyway. I do have a BBH (Babyliss Big Hair). Try to let dry naturally if possible or blow-dry when short on time.

What can I do?!

I'm 50 too and the thing that improved the condition of my hair the most was to let the grey grow out (it's actually a good striped mix) and go on HRT.

However, I do recommend a conditioner with Lanolin in (lush American cream is an example) and use the Colour Wow spray in if you use heat activation.

I've also tried the hair mask from Josh Wood which I have to say was very very good.

I have curly hair I keep straight so may have different requirements. But all of the above stops my frizz.

Yep, growing out the grey is not an option as I don't have much, just at the sides!

Will try the Lush or a lanolin conditioner thanks!