I was observing a leaky tap today and I noticed that when I poked the approximately hemispherical surface developed before the water dropped, the water quickly came off as a stream.
If I don't disturb it, the leaky tap would drop out water droplets periodically in some time interval.
Why does the poke lead to a stream of water to gush out of the tap while otherwise it is periodic drops?
I do understand the surface tension going on here. I am just asking why when I poke the water falls through, while the other cause it goes drop wise. Like, after the water drop falls, it seems again the surface is reformed before it breaks, while in the other case there is no reformation of surface and the liquid just keeps pouring.