diff --git a/app/src/modules/simulation/actions/conveyor/actionHandler/useDespawnHandler.ts b/app/src/modules/simulation/actions/conveyor/actionHandler/useDespawnHandler.ts
index 1c7a69c..750a5d7 100644
--- a/app/src/modules/simulation/actions/conveyor/actionHandler/useDespawnHandler.ts
+++ b/app/src/modules/simulation/actions/conveyor/actionHandler/useDespawnHandler.ts
@@ -2,7 +2,7 @@ import { useCallback } from "react";
 import { useMaterialStore } from "../../../../../store/simulation/useMaterialStore";
 
 export function useDespawnHandler() {
-    const { addMaterial, getMaterialById, setMaterial } = useMaterialStore();
+    const { addMaterial, getMaterialById, removeMaterial } = useMaterialStore();
 
     const deSpawnLogStatus = (materialUuid: string, status: string) => {
         console.log(`${materialUuid}, ${status}`);
@@ -14,9 +14,11 @@ export function useDespawnHandler() {
         const material = getMaterialById(materialId);
         if (!material) return;
 
+        removeMaterial(material.materialId);
+
         deSpawnLogStatus(material.materialId, `Despawned`);
 
-    }, [addMaterial, getMaterialById, setMaterial]);
+    }, [addMaterial, getMaterialById, removeMaterial]);
 
     return {
         handleDespawn,
diff --git a/app/src/modules/simulation/materials/instances/instance/materialInstance.tsx b/app/src/modules/simulation/materials/instances/instance/materialInstance.tsx
index 501e00d..a26109c 100644
--- a/app/src/modules/simulation/materials/instances/instance/materialInstance.tsx
+++ b/app/src/modules/simulation/materials/instances/instance/materialInstance.tsx
@@ -83,13 +83,6 @@ function MaterialInstance({ material }: { material: MaterialSchema }) {
         }
     }
 
-    useEffect(() => {
-        if (material.current && material.next) {
-            // console.log('current: ', material.current.pointUuid);
-            // console.log('next: ', material.next.pointUuid);
-        }
-    }, [material])
-
     const callTrigger = () => {
         if (!material.next) return;
         const fromModel = getEventByModelUuid(selectedProduct.productId, material.next.modelUuid);
diff --git a/app/src/modules/simulation/materials/instances/materialInstances.tsx b/app/src/modules/simulation/materials/instances/materialInstances.tsx
index 1864f0f..5ad4913 100644
--- a/app/src/modules/simulation/materials/instances/materialInstances.tsx
+++ b/app/src/modules/simulation/materials/instances/materialInstances.tsx
@@ -3,12 +3,16 @@ import MaterialInstance from './instance/materialInstance'
 import { useMaterialStore } from '../../../../store/simulation/useMaterialStore';
 
 function MaterialInstances() {
-    const { materials } = useMaterialStore();
+    const { materials, materialHistory } = useMaterialStore();
 
     useEffect(() => {
         // console.log('materials: ', materials);
     }, [materials])
 
+    useEffect(() => {
+        // console.log('materialHistory: ', materialHistory);
+    }, [materialHistory])
+
     return (
         <>
 
diff --git a/app/src/store/simulation/useMaterialStore.ts b/app/src/store/simulation/useMaterialStore.ts
index a2b95cb..044f9c5 100644
--- a/app/src/store/simulation/useMaterialStore.ts
+++ b/app/src/store/simulation/useMaterialStore.ts
@@ -3,6 +3,7 @@ import { immer } from 'zustand/middleware/immer';
 
 type MaterialsStore = {
     materials: MaterialsSchema;
+    materialHistory: MaterialHistorySchema;
 
     addMaterial: (material: MaterialSchema) => MaterialSchema | undefined;
     removeMaterial: (materialId: string) => MaterialSchema | undefined;
@@ -41,11 +42,13 @@ type MaterialsStore = {
     getMaterialByCurrentPointUuid: (currentPointUuid: string) => MaterialSchema | undefined;
     getMaterialsByPoint: (pointUuid: string) => MaterialSchema[];
     getMaterialsByModel: (modelUuid: string) => MaterialSchema[];
+    getMaterialHistory: () => MaterialHistorySchema;
 };
 
 export const useMaterialStore = create<MaterialsStore>()(
     immer((set, get) => ({
         materials: [],
+        materialHistory: [],
 
         addMaterial: (material) => {
             let updatedMaterial: MaterialSchema | undefined;
@@ -60,8 +63,13 @@ export const useMaterialStore = create<MaterialsStore>()(
             set((state) => {
                 const material = state.materials.find(m => m.materialId === materialId);
                 if (material) {
-                    state.materials.filter(m => m.materialId !== material.materialId);
+                    state.materials = state.materials.filter(m => m.materialId !== materialId);
                     updatedMaterial = JSON.parse(JSON.stringify(material));
+
+                    state.materialHistory.push({
+                        material,
+                        removedAt: new Date().toISOString()
+                    });
                 }
             });
             return updatedMaterial;
@@ -242,5 +250,9 @@ export const useMaterialStore = create<MaterialsStore>()(
                 m.next?.modelUuid === modelUuid
             );
         },
+
+        getMaterialHistory: () => {
+            return get().materialHistory;
+        },
     }))
 );
\ No newline at end of file
diff --git a/app/src/types/simulationTypes.d.ts b/app/src/types/simulationTypes.d.ts
index 7dc210b..04b742d 100644
--- a/app/src/types/simulationTypes.d.ts
+++ b/app/src/types/simulationTypes.d.ts
@@ -219,4 +219,11 @@ interface MaterialSchema {
     } | null;
 }
 
-type MaterialsSchema = MaterialSchema[];
\ No newline at end of file
+type MaterialsSchema = MaterialSchema[];
+
+interface MaterialHistoryEntry {
+    material: MaterialSchema;
+    removedAt: string;
+}
+
+type MaterialHistorySchema = MaterialHistoryEntry[];
\ No newline at end of file