I hear you. I say try 5-8 drops before the boil starts. Stir it in, and just monitor it for a few minutes after the boil starts. I think you'll find the foam disappears, and then even with a good rolling boil, you'll have zero chance of a boil over.i will have to try that on my next boil. i started with what the directions called for, which was 3 drops per gallon and then adjusted from there.