diff --git a/Runtime/Scripts/Core/Neuron.cs b/Runtime/Scripts/Core/Neuron.cs
index 5d4e4ac..3b60353 100644
--- a/Runtime/Scripts/Core/Neuron.cs
+++ b/Runtime/Scripts/Core/Neuron.cs
@@ -121,7 +121,7 @@ namespace NanoBrain {
         /// <param name="inputValue"></param>
         public virtual void SetBias(Vector3 inputValue) {
             this.bias = inputValue;
-            this.lastUpdate = Time.time;
+            // this.lastUpdate = Time.time;
             this.parent?.UpdateFromNucleus(this);
         }
 
@@ -251,30 +251,30 @@ namespace NanoBrain {
         /// <summary>
         /// True when the neuron is not persisting and has not be updated for timeToSleep seconds
         /// </summary>
-        public virtual bool isSleeping => false; //!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>
         /// This will reset the output value if it is sleeping
-        public void SleepCheck() {
-            if (this.isSleeping && this.outputSqrMagnitude > 0) {
-#if UNITY_MATHEMATICS
-                this._outputValue = new float3(0, 0, 0);
-#else
-                this._outputValue = new Vector3(0,0,0);
-#endif
-            }
-        }
+//         public void SleepCheck() {
+//             if (this.isSleeping && this.outputSqrMagnitude > 0) {
+// #if UNITY_MATHEMATICS
+//                 this._outputValue = new float3(0, 0, 0);
+// #else
+//                 this._outputValue = new Vector3(0,0,0);
+// #endif
+//             }
+//         }
 
         /// <summary>
         /// The time at which the last update has been done
         /// </summary>
-        [HideInInspector]
-        public float lastUpdate = 0;
+        // [HideInInspector]
+        // public float lastUpdate = 0;
         /// <summary>
         /// Time in seconds after the last update the neuron can go to sleep
         /// </summary>
-        public static readonly float timeToSleep = 0.5f;
+        // public static readonly float timeToSleep = 0.5f;
 
         /// <summary>
         /// When true, Unity will pause exection when this neuron is updated
@@ -402,7 +402,7 @@ namespace NanoBrain {
             }
             this.combination = Combinator(this.bias, this.synapses);
             this.outputValue = Activator(this.combination);
-            this.lastUpdate = Time.time;
+            // this.lastUpdate = Time.time;
         }
 
         #region Combinator
@@ -437,8 +437,8 @@ namespace NanoBrain {
         public static float3 CombinatorSum(float3 bias, List<Synapse> synapses) {
             float3 sum = bias;
             foreach (Synapse synapse in synapses) {
-                synapse.neuron.SleepCheck();
-                sum += synapse.weight * synapse.neuron.outputValue;
+                // synapse.neuron.SleepCheck();
+                sum += synapse.weight * synapse.neuron._outputValue;
             }
             return sum;
         }
@@ -452,8 +452,8 @@ namespace NanoBrain {
         public static float3 CombinatorProduct(float3 bias, List<Synapse> synapses) {
             float3 product = bias;
             foreach (Synapse synapse in synapses) {
-                synapse.neuron.SleepCheck();
-                product *= synapse.weight * synapse.neuron.outputValue;
+                // synapse.neuron.SleepCheck();
+                product *= synapse.weight * synapse.neuron._outputValue;
             }
             return product;
         }
@@ -798,7 +798,7 @@ namespace NanoBrain {
         /// </summary>
         /// <param name="inputValue">The value of the stimulus</param>
         public virtual void ProcessStimulus(Vector3 inputValue, float autoResetDelay = 0) {
-            this.lastUpdate = Time.time;
+            // this.lastUpdate = Time.time;
             this.bias = inputValue;
             this.parent?.UpdateFromNucleus(this);
             this.resetStimulus ??= ResetStimulus;
diff --git a/Runtime/Scripts/Core/Population.cs b/Runtime/Scripts/Core/Population.cs
index 5b4c6ae..f854db5 100644
--- a/Runtime/Scripts/Core/Population.cs
+++ b/Runtime/Scripts/Core/Population.cs
@@ -88,7 +88,7 @@ namespace NanoBrain {
             member.brain.CopyWeightsFrom(ants[parent1].brain);
             member.brain.ProcessWeightsFrom(ants[parent2].brain, Average);
             // LogTrainableWeights(member.brain);
-            member.brain.GaussianAdditiveMutation(1e-1f);
+            member.brain.GaussianAdditiveMutation(1e-2f);
             // LogTrainableWeights(member.brain);
         }