Location and applying it right,you dont say how you are useing boilies/baits?
Are you putting shed load`s in and hoping for the best?.
Are you useing p.v.a. bag`s/net`s,stringers and keeping the trap`s tight,most boilies will work,but as Roto and Birds Nest have said,location and apply it right.
Are you fishing short or long session` as this will have a bearing on it.