Emiter node memory leak, need help.

I've implemented a system where every bullet impact spawns a particle emitter, the purpose is to add a small, controlled puff of dust that emit at a fixed angle relatively to the surface the bullet hit. This works fine except the fact that every emitter node spawned stays after the emitter is done emitting particles. This in turn means that every emitter node added will pile up. The more bullets I fire, the bigger the drop in fps.

If you look at ghostable objects you see an increase of one, every time a bullet hits a surface. I've spent the whole day trying to fix this but I can't find any solution that seems to work properly. Does anyone have a fix for this?

Here you have the code that spawns the emitter:

%emitter1 = new ParticleEmitterNode(){
           dataBlock = "standard_emitter_node";
           emitter   = %emitter_1_Db;
           position  = %pos;
           surfaceNormal = %ejectionVector;
   };
   MissionCleanup.add(%emitter1);