diff --git a/examples/example.py b/examples/example.py
index 72de5ca1..06c24e85 100644
--- a/examples/example.py
+++ b/examples/example.py
@@ -56,29 +56,34 @@ async def main():
 
     # Create a device manager that can discover devices.
     device_manager = await create_device_manager(user_params, cache=cache)
-    devices = await device_manager.get_devices()
 
-    # Get all vacuum devices that support the v1 PropertiesApi
-    device_results = []
-    for device in devices:
-        if not device.v1_properties:
-            continue
-
-        # Refresh the current device status
-        status_trait = device.v1_properties.status
-        await status_trait.refresh()
-
-        # Print the device status as JSON
-        device_results.append(
-            {
-                "device": device.name,
-                "status": remove_none_values(dataclasses.asdict(status_trait)),
-            }
-        )
-
-    print(json.dumps(device_results, indent=2))
-
-    await cache.flush()
+    try:
+        devices = await device_manager.get_devices()
+
+        # Get all vacuum devices that support the v1 PropertiesApi
+        device_results = []
+        for device in devices:
+            if not device.v1_properties:
+                continue
+
+            # Refresh the current device status
+            status_trait = device.v1_properties.status
+            await status_trait.refresh()
+
+            # Print the device status as JSON
+            device_results.append(
+                {
+                    "device": device.name,
+                    "status": remove_none_values(dataclasses.asdict(status_trait)),
+                }
+            )
+
+        print(json.dumps(device_results, indent=2))
+
+    finally:
+        # Close device manager to cancel background tasks before flushing cache
+        await device_manager.close()
+        await cache.flush()
 
 
 if __name__ == "__main__":
diff --git a/roborock/devices/traits/v1/device_features.py b/roborock/devices/traits/v1/device_features.py
index c4383d01..044f662d 100644
--- a/roborock/devices/traits/v1/device_features.py
+++ b/roborock/devices/traits/v1/device_features.py
@@ -34,7 +34,11 @@ async def refresh(self) -> None:
             return
         # Save cached device features
         await super().refresh()
-        cache_data.device_features = self
+        # Create a pure DeviceFeatures instance without runtime objects
+        device_features_data = DeviceFeatures()
+        for field in fields(DeviceFeatures):
+            setattr(device_features_data, field.name, getattr(self, field.name))
+        cache_data.device_features = device_features_data
         await self._device_cache.set(cache_data)
 
     def _parse_response(self, response: common.V1ResponseData) -> DeviceFeatures:
diff --git a/roborock/devices/traits/v1/network_info.py b/roborock/devices/traits/v1/network_info.py
index a88394cd..57d0b89f 100644
--- a/roborock/devices/traits/v1/network_info.py
+++ b/roborock/devices/traits/v1/network_info.py
@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import logging
+from dataclasses import fields
 
 from roborock.data import NetworkInfo
 from roborock.devices.cache import DeviceCache
@@ -45,7 +46,11 @@ async def refresh(self) -> None:
 
         # Update the cache with the new network info
         device_cache_data = await self._device_cache.get()
-        device_cache_data.network_info = self
+        # Create a pure NetworkInfo instance without runtime objects
+        network_info_data = NetworkInfo(ip="")
+        for field in fields(NetworkInfo):
+            setattr(network_info_data, field.name, getattr(self, field.name))
+        device_cache_data.network_info = network_info_data
         await self._device_cache.set(device_cache_data)
 
     def _parse_response(self, response: common.V1ResponseData) -> NetworkInfo: