Yep, Patrick's right. These phenolic clams get sunburned, wear, and lose their sharpness. You can replace it with identical, or do as I did, and go aluminum. (They are also available in anodized, painted AL). We sell them all the time, and you should be able to get one from any decent chandlery.
Paul Van Voorhees
Certified Tohatsu TLDI Technician
Mgr, Obersheimer Sails
Buffalo, NY USA