I think that it all comes down to the coffee, I have a coffeeshop in Athens and make countless cups of Greek coffee everyday. I hardly ever use a briki, I just use a saucepan, mainly because I sometimes have to make about 10 at a time. The formula is simple For sweet coffee One Greek Coffee cup of cold water, 1 teaspoon of coffee, 2 teaspoons of sugar For semisweet 1 cup of water,1 teaspoon of coffee,1 teaspoon of sugar I find that the thickness of the foam depends on how much sugar you add, Greek coffee without sugar tend to have less "kaimaki or cream" whereas sweet Greek coffee has a thick kaimaki without much effort, The secret is to let it cook slowly, stirring initially until the coffee and water mix then let it come to a boil. I know the theory about letting it boil three times but I find that this causes the foam to disappear Just my two cents worth