is the Redex to blame ?

[samsan]

I thought I had cured the juddering under acceleration problems after using a bottle of Forte diesel turbo cleaner. Put £30 of diesel in with the bottle of Forte and after a couple if days the car was running sweet as a nut, juddering disappeared. Now ive put some Redex diesel fuel treatment in and almost instantly the juddering is back even worse than last time. Anyone have any idea what's going on ? Too much of a coincidence for it not to be the Redex ? Any ideas, thoughts appreciated.