Our kitchen faucet spray hose has suddenly started to sputter when
used.

What might cause this? There is no apparent pressure loss in the sink
and there are no kinks in the line itself, but when we push the lever,
it sputters and most of the water continues through the faucet into
the sink. I am thinking that maybe there is something foreign in the
line...this was a rather abrupt change, as opposed to something
degrading over time.

TIA.