Ant;
What do you mean by sweet spot ? If you mean " How much do I use , in what quantity , and how often ? " Then I think you might want to take the advice of others here on the forum and OD on the pheromone to see how much is to much. Experimentation is the key. You’ll need to find out your own individual results. There is some really great advice here if you search for it. Look here … need help with A314.
This might help.