"Control", a verb, means to pick up things that may have water or oil in them, such as tofu/cabbage/clothes/mop, and then let the liquid drip freely until it doesn't come out. Generally speaking, dripping liquid is unnecessary. Of course, if it is oil, it is ok to keep it for frying other dishes.

When cooking, control the moisture of raw materials before cooking, so that there won't be much soup.

It can be said that it is "controlling water to make tofu", it can also be said that it is "controlling the oil of fried meatballs clean", and it can also be said that it is "mopping the floor after dragging the water", and so on.

It seems that the landlord seldom does housework.