diff --git a/mlair/data_handler/data_handler_kz_filter.py b/mlair/data_handler/data_handler_kz_filter.py
index 943f3af390cba7ade4a77fe5aaf8e87a984abff3..0798b11a538c67884ed9b7acf89de1cbe474c81a 100644
--- a/mlair/data_handler/data_handler_kz_filter.py
+++ b/mlair/data_handler/data_handler_kz_filter.py
@@ -42,10 +42,11 @@ class DataHandlerKzFilterSingleStation(DataHandlerSingleStation):
         import matplotlib.pyplot as plt
         # self.original_data = self.data  # ToDo: implement here something to store unfiltered data
         self.apply_kz_filter()
-        self.data.sel(filter="74d", variables="temp", Stations="DEBW107").plot()
+        # self.data.sel(filter="74d", variables="temp", Stations="DEBW107").plot()
+        # self.data.sel(variables="temp", Stations="DEBW107").plot.line(hue="filter")
         if self.transformation is not None:
             self.call_transform()
-        self.make_samples()  # ToDo: target samples are still comming from filtered data
+        self.make_samples()  # ToDo: target samples are still coming from filtered data
 
     @TimeTrackingWrapper
     def apply_kz_filter(self):
diff --git a/mlair/run_modules/pre_processing.py b/mlair/run_modules/pre_processing.py
index 9b8ebbb2a88b879fe3549c2cba70fd8085d965fb..82af9cf02cda9401237bac15ccf0a52fa10acdad 100644
--- a/mlair/run_modules/pre_processing.py
+++ b/mlair/run_modules/pre_processing.py
@@ -230,6 +230,3 @@ class PreProcessing(RunEnvironment):
             transformation_dict = data_handler.transformation(stations, **kwargs)
             if transformation_dict is not None:
                 self.data_store.set("transformation", transformation_dict)
-
-
-