If the tap isn't turning as much as it used to and feels stiff to turn then it probably is the tap insert jammed usually with water getting past a seal into places it shouldn't. if so then you can buy new inserts from diy stores cheap-but remember to turn off water to tap if you do the job. alternately you can strip clean and grease with vaseline or similar-but no garantee how long before it goes again.
daz71
November 2008