diff --git a/openfe/openfe.py b/openfe/openfe.py
index 8d7596c..4fd4d56 100644
--- a/openfe/openfe.py
+++ b/openfe/openfe.py
@@ -715,8 +715,10 @@ def _calculate_and_evaluate(self, candidate_features, train_idx, val_idx):
         length = int(np.ceil(len(candidate_features) / self.n_jobs / 4))
         n = int(np.ceil(len(candidate_features) / length))
         random.shuffle(candidate_features)
-        for f in candidate_features:
-            f.delete()
+        # for f in candidate_features:
+        #     f.delete()
+        for f in self.candidate_features:
+            del f
         with ProcessPoolExecutor(max_workers=self.n_jobs) as ex:
             with tqdm(total=n) as progress:
                 for i in range(n):