diff --git a/Editor/Cluster_Drawer.cs b/Editor/Cluster_Drawer.cs
index 79e9037..d8be713 100644
--- a/Editor/Cluster_Drawer.cs
+++ b/Editor/Cluster_Drawer.cs
@@ -102,6 +102,8 @@ namespace NanoBrain.Unity {
                         cluster = SerializedPropertyUtility.GetManagedObjectForProperty(targetObject, property.propertyPath) as Cluster;
                     }
                     else {
+                        // This does not work property yet it seems
+                        Debug.Log("Instantiate");
                         ClusterPrefab clusterPrefab = prefabProp.objectReferenceValue as ClusterPrefab;
                         cluster = new(clusterPrefab);
                         object parent = SerializedPropertyUtility.GetParentObjectAndMember(targetObject, property.propertyPath, out var memberInfo, out int outIndex);
diff --git a/Runtime/Scripts/Core/Neuron.cs b/Runtime/Scripts/Core/Neuron.cs
index 7e9b9ae..0625801 100644
--- a/Runtime/Scripts/Core/Neuron.cs
+++ b/Runtime/Scripts/Core/Neuron.cs
@@ -351,13 +351,13 @@ 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 > this.timeToSleep);
+        public virtual bool isSleeping => !persistOutput && (Time.time - this.lastUpdate > timeToSleep);
         /// <summary>
         /// Check if the neuron is sleeping.
         /// </summary>
         /// This will reset the output value if it is sleeping
         public void SleepCheck() {
-            if (this.isSleeping) {
+            if (this.isSleeping && this.outputSqrMagnitude > 0) {
 #if UNITY_MATHEMATICS
                 this._outputValue = new float3(0, 0, 0);
 #else
@@ -373,7 +373,9 @@ namespace NanoBrain {
         /// <summary>
         /// Time in seconds after the last update the neuron can go to sleep
         /// </summary>
-        public readonly float timeToSleep = 1f;
+        public static readonly float timeToSleep = 1f;
+
+        public bool breakOnUpdate = false;
 
         /// \copydoc NanoBrain::Nucleus::ShallowCloneTo
         public override Nucleus ShallowCloneTo(Cluster parent) {
@@ -395,6 +397,7 @@ namespace NanoBrain {
             clone.curve = this.curve;
             clone.activator = this.activator;
             clone.curveMax = this.curveMax;
+            clone.breakOnUpdate = this.breakOnUpdate;
         }
 
         /// <summary>
@@ -445,6 +448,9 @@ namespace NanoBrain {
 
         /// \copydoc NanoBrain::Nucleus::UpdateStateIsolated
         public override void UpdateStateIsolated() {
+            if (breakOnUpdate) {
+                Debug.Break();
+            }
             var combination = Combinator(this.bias, this.synapses);
             this.outputValue = Activator(combination);
             this.lastUpdate = Time.time;