diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 8c2722ca..f64f039d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -207,7 +207,7 @@ jobs:
           echo "Initial free space"
           df -h /
           echo "Removing all pre-loaded docker images"
-          docker rmi $(docker image ls -aq)  # Removes ~3GB
+          docker image ls -aq | xargs -r docker rmi # Removes ~3GB
           df -h /
           echo "Listing 100 largest packages"
           dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -rn | head -n 100
diff --git a/Assets/Scripts/model/core/MeshWithMaterialRenderer.cs b/Assets/Scripts/model/core/MeshWithMaterialRenderer.cs
index 2ac21955..6f18c996 100644
--- a/Assets/Scripts/model/core/MeshWithMaterialRenderer.cs
+++ b/Assets/Scripts/model/core/MeshWithMaterialRenderer.cs
@@ -51,6 +51,14 @@ public void UsePreviewShader(bool usePreview)
         // Which Layer this mesh will be drawn to.
         public int Layer = DEFAULT_LAYER;
 
+        public void OnDestroy()
+        {
+            foreach (MeshWithMaterial meshWithMaterial in meshes)
+            {
+                Destroy(meshWithMaterial.mesh);
+            }
+        }
+
         public void Init(WorldSpace worldSpace)
         {
             this.worldSpace = worldSpace;
diff --git a/Assets/Scripts/model/main/PeltzerMain.cs b/Assets/Scripts/model/main/PeltzerMain.cs
index b443af10..e96b28e3 100644
--- a/Assets/Scripts/model/main/PeltzerMain.cs
+++ b/Assets/Scripts/model/main/PeltzerMain.cs
@@ -1550,6 +1550,8 @@ public void CreateNewModel(bool clearReferenceImages = true, bool resetAttention
             zoomer.ClearState();
             model.Clear(worldSpace);
             volumeInserter.ClearState();
+            MeshCycler.DestroyMeshes();
+
             spatialIndex.Reset(DEFAULT_BOUNDS);
             if (resetAttentionCaller)
             {
diff --git a/Assets/Scripts/model/render/MeshHelper.cs b/Assets/Scripts/model/render/MeshHelper.cs
index e6c54f7d..30f17413 100644
--- a/Assets/Scripts/model/render/MeshHelper.cs
+++ b/Assets/Scripts/model/render/MeshHelper.cs
@@ -21,6 +21,7 @@
 using com.google.apps.peltzer.client.model.import;
 using com.google.apps.peltzer.client.model.main;
 using com.google.apps.peltzer.client.model.util;
+using Object = System.Object;
 
 namespace com.google.apps.peltzer.client.model.render
 {
@@ -165,6 +166,11 @@ public static void UpdateMeshes(MMesh updatedMesh, List<MeshWithMaterial> existi
                     newPos.Count != uMesh.mesh.vertices.Count())
                 {
                     // If materials changed, easiest action is to remesh everything.
+                    foreach (var mm in existing)
+                    {
+                        UnityEngine.Object.Destroy(mm.mesh);
+                        UnityEngine.Object.Destroy(mm.materialAndColor.material);
+                    }
                     existing.Clear();
                     // This method is used to update a GameObject, and as such we do not want the vert positions in model space,
                     // it is the gameObject that will be placed and rotated in the world.
diff --git a/Assets/Scripts/model/render/ReMesher.cs b/Assets/Scripts/model/render/ReMesher.cs
index 836fc2b6..85558645 100644
--- a/Assets/Scripts/model/render/ReMesher.cs
+++ b/Assets/Scripts/model/render/ReMesher.cs
@@ -19,6 +19,8 @@
 using com.google.apps.peltzer.client.model.core;
 using com.google.apps.peltzer.client.model.util;
 using com.google.apps.peltzer.client.model.main;
+using UnityEditor;
+using Object = UnityEngine.Object;
 
 namespace com.google.apps.peltzer.client.model.render
 {
@@ -342,8 +344,14 @@ public static void InitBufferCaches()
 
         public void Clear()
         {
-            meshInfosByMaterial.Clear();
+            foreach (var meshInfo in allMeshInfos)
+            {
+                Object.Destroy(meshInfo.mesh);
+                Object.Destroy(meshInfo.materialAndColor.material);
+            }
             allMeshInfos.Clear();
+            meshInfosByMaterial.Clear();
+            meshInfosByMesh.Clear();
             meshesPendingAdd.Clear();
             meshesPendingRemove.Clear();
             meshInfosPendingRegeneration.Clear();
diff --git a/Assets/Scripts/tools/utils/HighlightStyles/MeshCycler.cs b/Assets/Scripts/tools/utils/HighlightStyles/MeshCycler.cs
index b9a11379..14560190 100644
--- a/Assets/Scripts/tools/utils/HighlightStyles/MeshCycler.cs
+++ b/Assets/Scripts/tools/utils/HighlightStyles/MeshCycler.cs
@@ -86,5 +86,15 @@ public static void ResetCycler()
             }
             meshDict.Clear();
         }
+
+        public static void DestroyMeshes()
+        {
+            ResetCycler();
+            foreach (Mesh mesh in meshPool)
+            {
+                Object.Destroy(mesh);
+            }
+            meshPool.Clear();
+        }
     }
 }