diff --git a/manim/scene/scene_file_writer.py b/manim/scene/scene_file_writer.py
index 1891588675..d9e509de89 100644
--- a/manim/scene/scene_file_writer.py
+++ b/manim/scene/scene_file_writer.py
@@ -700,9 +700,8 @@ def clean_cache(self):
             )
             oldest_files_to_delete = sorted(
                 cached_partial_movies,
-                key=os.path.getatime,
+                key=lambda path: path.stat().st_atime,
             )[:number_files_to_delete]
-            # oldest_file_path = min(cached_partial_movies, key=os.path.getatime)
             for file_to_delete in oldest_files_to_delete:
                 file_to_delete.unlink()
             logger.info(
diff --git a/manim/utils/file_ops.py b/manim/utils/file_ops.py
index 1bbb048214..ae06561991 100644
--- a/manim/utils/file_ops.py
+++ b/manim/utils/file_ops.py
@@ -183,7 +183,7 @@ def modify_atime(file_path: str) -> None:
     file_path
         The path of the file.
     """
-    os.utime(file_path, times=(time.time(), os.path.getmtime(file_path)))
+    os.utime(file_path, times=(time.time(), Path(file_path).stat().st_mtime))
 
 
 def open_file(file_path, in_browser=False):