diff --git a/include/RunAction.hh b/include/RunAction.hh
index ef1c1e3d4f2e68500d283e1bfa501eac1dcd6b18..e48e114b70596b3c229c402b1337528123c4e362 100644
--- a/include/RunAction.hh
+++ b/include/RunAction.hh
@@ -55,6 +55,7 @@ class RunAction : public G4UserRunAction
     virtual void EndOfRunAction(const G4Run* aRun);
 
     std::vector< std::vector<double>* > GetVectors(){ return fPtrVec; }
+    inline  void ClearVectors(){ for(auto vec : fPtrVec) vec->clear(); }
 
   private:
     G4Timer* fTimer;
diff --git a/src/EventAction.cc b/src/EventAction.cc
index 2db980b9f2ce9333f3f0601356c37ec40ab53f04..45c22c1d031115a9c0ba700730aa61a72caf1204 100644
--- a/src/EventAction.cc
+++ b/src/EventAction.cc
@@ -30,12 +30,14 @@
 #include "G4ParticleDefinition.hh"
 #include "G4ParticleTypes.hh"
 #include "G4SDManager.hh"
+#include "G4RunManager.hh"
 #include "G4Event.hh"
 #include "G4Track.hh"
 #include "G4ios.hh"
 
 #include "PMTHit.hh"
 #include "lgAnalysis.hh"
+#include "RunAction.hh"
 
 /*
  *
@@ -69,4 +71,6 @@ void EventAction::EndOfEventAction(const G4Event* event){
   G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
   analysisManager->FillNtupleIColumn( 0, event->GetEventID());
   analysisManager->AddNtupleRow();
+
+  ((RunAction*)G4RunManager::GetRunManager()->GetUserRunAction())->ClearVectors();
 }