Hi
Our kitchen tap (hot water) has all of a sudden gone loose - i.e you have to
turn it about 4 times before it starts letting any water out! Also it now
leaks drips when its totally off. We normally have fairly high water
pressure as well.

They are single taps (i.e 1 hot 1 cold and the top part under the handle can
be unscrewed)

Any ideas??