Regrooving your irons, particularly your wedges can increase grip and in turn improve control and feel around the green. To get those pitch shots spinning back with your wedges you need to keep those grooves well maintained.

Regripping your clubs is a useful skill to learn and not as difficult as many people think.  Also a lot of golfers tend to let their grips wear right down on all of their clubs before changing the grips on the full set.  Instead you can change the grip on an individual club or a number of clubs when required.  This is less time consuming and cheaper.