For ladies who pump...

Mrs.S • Wife, mother, writer... ❤️ a good debate 🗣 Living in the Land of the Free 🇺🇸
How many times do you letdown during a pumping session? I only letdown once at the beginning, even when I hit the letdown button two or three times. Shouldn't the letdown button work on command? I have the Medela pump-In-Style.