Tha Milk Spoiler
Sandbox is the easiest, followed by Milky Mode as this will eventually get to the required production values regardless.
Has to be before completion as it's technically a game-over screen.
'Fullness Tolerance' needed. Screen only fills when you don't milk, screen drains when you do milk.
i think it take between halve or full hour playing and only upgrading production and buying ingreedients. then let her leaking for 5 seconds and you should see slowly it comming up.
in theory the level is always rising but on a very slow peace.