This goo is packed with tiny cornstarch grains. Water winds through the narrow gaps between them.
A hard push needs a touching grain path that can carry force from one side of the bowl to the other.
Tap to crowd the grains until their contacts connect.
In the usual thick recipe, a slow push gives grains time to slide. A fast push crowds them into contact.
slowfast
Try both speeds in that same normal batch. Only the push time changes.
Choose a push.
New recipe: keep the same scoop of cornstarch, but add one extra cup of water. No punch yet.
The next test keeps the punch just as fast.
Same grains. Same fast punch. One extra cup of water.