I have a Dishmaster Imperial Four kitchen faucet with a tendency to drip. To
stop the drip, I loosen the handle and reposition it so that I can make the
faucet tighter before the handle hits the stop. This usually stops the drip
at the expense of a very tight faucet. Later, I find that the faucet can be
much looser and not drip. That is, I open the faucet to the point that could
cause a fast drip before the tightening.

What is it that makes the faucet behavior so unstable? Is there some scale
that gets stuck on the seat that causes the drip? Does such scale wash away
later? What is happening and how can I avoid replacing the seals every year
or so?

Bill

-- Ferme le Bush