diff --git a/hwmonDaemon.py b/hwmonDaemon.py
index 6d35342..15f39dc 100644
--- a/hwmonDaemon.py
+++ b/hwmonDaemon.py
@@ -3163,9 +3163,11 @@ class SystemHealthMonitor:
         hostname = health_report.get('hostname', socket.gethostname())
         metrics = []
 
-        # Helper to format labels
+        # Helper to format labels with proper Prometheus escaping
         def labels(**kwargs) -> str:
-            pairs = [f'{k}="{v}"' for k, v in kwargs.items() if v is not None]
+            def escape(value):
+                return str(value).replace('\\', '\\\\').replace('"', '\\"').replace('\n', '\\n')
+            pairs = [f'{k}="{escape(v)}"' for k, v in kwargs.items() if v is not None]
             return '{' + ','.join(pairs) + '}' if pairs else ''
 
         # === System Info ===