diff --git a/Runtime/Scripts/Core/Cluster.cs b/Runtime/Scripts/Core/Cluster.cs
index d823240..3d154f7 100644
--- a/Runtime/Scripts/Core/Cluster.cs
+++ b/Runtime/Scripts/Core/Cluster.cs
@@ -202,39 +202,6 @@ namespace NanoBrain {
                             // If not: create new synapse
                             extNeuron.AddReceiver(receiver);
                         }
-
-                        //Cluster foundCluster = this.nuclei.Find(nucleus => nucleus is Cluster cluster && cluster.prefab.name == synapseData.clusterName) as Cluster;
-
-
-                        /*
-                                            ClusterPrefab extPrefab = Resources.Load(synapseData.clusterName) as ClusterPrefab;
-                                            if (extPrefab == null)
-                                                Debug.LogError($"Could not find cluster Resource {synapseData.clusterName}");
-                                            else {
-                                                uint instanceCount = 1;
-                                                ExternalClusterData externalClusterData = null;
-                                                foreach (ExternalClusterData externalCluster in clusterData.clusters) {
-                                                    if (externalCluster.prefabName == synapseData.clusterName) {
-                                                        instanceCount = externalCluster.instanceCount;
-                                                        externalClusterData = externalCluster;
-                                                    }
-                                                }
-                                                Nucleus foundNucleus = this.nuclei.Find(nucleus => nucleus is Cluster cluster && cluster.prefab.name == synapseData.clusterName);
-                                                if (foundNucleus is not Cluster extCluster) {
-                                                    Debug.Log("New ext cluster");
-                                                    extCluster = new(extPrefab, this, instanceCount);
-                                                    if (externalClusterData != null)
-                                                        extCluster.name = externalClusterData.name;
-                                                    //extCluster.name = clusterData.name;
-                                                }
-                                                Neuron extNeuron = extCluster.GetNeuron(synapseData.neuronName);
-                                                Synapse synapse = receiver.GetSynapse(extCluster, synapseData.neuronName);
-                                                if (synapse == null) {
-                                                    Debug.Log("Add receiver for external");
-                                                    extNeuron.AddReceiver(receiver);
-                                                }
-                                            }
-                    */
                     }
                     else {
                         Neuron sender = this.GetNeuron(synapseData.neuronName);
@@ -439,12 +406,11 @@ namespace NanoBrain {
                         if (synapse.trainable) {
                             synapse.GaussianAdditiveMutation(sigma);
                             //synapse.weight = (float)randomGenerator.NextDouble() * 2.0f - 1.0f;
-                            Debug.Log($"{neuron.name}-{synapse.neuron.name} weight = {synapse.weight}");
+                            // Debug.Log($"{neuron.name}-{synapse.neuron.name} weight = {synapse.weight}");
                         }
                     }
                 }
             }
-
         }
 
         #endregion Init
diff --git a/Runtime/Scripts/Core/Neuron.cs b/Runtime/Scripts/Core/Neuron.cs
index 24aea7d..607b5cd 100644
--- a/Runtime/Scripts/Core/Neuron.cs
+++ b/Runtime/Scripts/Core/Neuron.cs
@@ -245,7 +245,7 @@ namespace NanoBrain {
         /// <summary>
         /// True when the neuron is not persisting and has not be updated for timeToSleep seconds
         /// </summary>
-        public virtual bool isSleeping => !persistOutput && (Time.time - this.lastUpdate > timeToSleep);
+        public virtual bool isSleeping => false; //!persistOutput && (Time.time - this.lastUpdate > timeToSleep);
         /// <summary>
         /// Check if the neuron is sleeping.
         /// </summary>