You don't need Vodka with StaFlo. I use the StaFlo in about a 4 to 1 ratio. One part StaFlo and four parts water. Shake and spray.
If you want a really fine spray, get a spray bottle from your beautician. The spray comes out as mist, not as water droplets. This works as well as Best Press and costs way less than one tenth the price.
If there are white specks, that means you ironed it too soon. Let it soak for a few seconds. Spray a larger area and by the time you are finished with the spraying, the first part is ready to iron.
And any white specks can be shaken off. They don't hurt anything.