How long has it been since his last molt? My peacocks smashers are worn down quite a bit, after his next molt they should be restored. The only thing you can do to help your fellow is keep up with water changes to restore trace elements and you might also want to buy a frozen bag of silversides and switch between frozen and live snails/hermits. Also, if he is new to the tank or started new construction this can take a toll on his weapons as well.