diff --git a/connectors.py b/connectors.py
index 9a5d345..99ee2f3 100644
--- a/connectors.py
+++ b/connectors.py
@@ -35,13 +35,12 @@ class Cache:
             timestamp = datetime.now().timestamp()
 
             # clear old data
-            for cache_data in self.CACHE_DATA:
-                for connector_class in cache_data:
-                    for connector_func in connector_class:
-                        for connector_query in connector_func:
-                            for connector_page in connector_query:
-                                if connector_page['timeout'] < timestamp:
-                                    del connector_query
+            for connector_class in list(self.CACHE_DATA):
+                for connector_func in list(self.CACHE_DATA[connector_class]):
+                    for connector_query in list(self.CACHE_DATA[connector_class][connector_func]):
+                        for connector_page in list(self.CACHE_DATA[connector_class][connector_func][connector_query]):
+                            if self.CACHE_DATA[connector_class][connector_func][connector_query][connector_page]['timeout'] < timestamp:
+                                del self.CACHE_DATA[connector_class][connector_func][connector_query][connector_page]
 
             if connector.__class__.__name__ not in self.CACHE_DATA:
                 self.CACHE_DATA[connector.__class__.__name__] = {}