diff --git a/src/nmreval/data/points.py b/src/nmreval/data/points.py
index e4895f4..b394efa 100644
--- a/src/nmreval/data/points.py
+++ b/src/nmreval/data/points.py
@@ -697,17 +697,20 @@ class Points:
             np.savetxt(path, self.toarray(err=err), header=header, fmt='%.10e')
         else:
             with path.open('w') as f:
-                f.write(header)
+                f.write('# ' + '\n# '.join(header.split('\n')))
+                f.write('\n')
                 for i, l in enumerate(self.toarray(err=err)):
                     if self.mask[i]:
                         f.write('\t'.join(map(lambda _x: f'{_x:.10e}', l.tolist())) + '\n')
                     else:
-                        f.write('#' + '\t'.join(map(lambda _x: f'{_x:.10e}', l.tolist())) + '\n')
+                        f.write('# ' + '\t'.join(map(lambda _x: f'{_x:.10e}', l.tolist())) + '\n')
 
     def get_state(self) -> dict:
-        ret_dic = {'x': self._x.tolist(),
-                   'y': self._y.tolist(),
-                   'mask': (np.where(~self.mask)[0]).tolist()}
+        ret_dic = {
+            'x': self._x.tolist(),
+            'y': self._y.tolist(),
+            'mask': (np.where(~self.mask)[0]).tolist()
+        }
 
         if np.all(self._y_err == 0):
             ret_dic['y_err'] = 0.0