secret formula

It’s here that Australian company SunDrive Solar makes its “special sauce”: a new - top secret - formula that it says has solved “a very high value problem”.

It’s here that Australian company SunDrive Solar makes its “special sauce”: a new - top secret - formula that it says has solved “a very high value problem”.

But Vince said he would not be drawn on the so-called "secret formula" he uses to aid the growth of his veg.

“Secret formula. My mother uses it on her hands, and it always works,” I told her.

Every mother in town was dying to know my secret formula for diaper rash.