If there really fussy try going down to a 7 gram sea rock in blue or sometimes they are fixed on pink only and remove the standard silver treble and replace with a black one this reduces the profile of the lure making it appear smaller,And drop leader down to 10 LB flurocarbon as they are very visual.One very big mistake alot of people make is using a snap swivel in front of there lure which means the differance between fish or no fish especially with frigates and bonito etc.