diff --git a/src/program.py b/src/program.py
index 0e338cb..8ba5970 100644
--- a/src/program.py
+++ b/src/program.py
@@ -173,7 +173,6 @@ def measure(sensor):
         except RuntimeError:
             fails += 1
         time.sleep(0.01)
-    #print(len(data), fails)
     if fails < (NUM_SAMPLES / 2):
         mid_count = NUM_SAMPLES // 2
         start_index = (NUM_SAMPLES - mid_count) // 2
@@ -184,7 +183,6 @@ def measure(sensor):
             val = 0
     else:
         val = 0
-    #val = random.uniform(5.0, 40.0)
     return val
 
 def store_value(config, val, meas, lvl, date):
@@ -394,8 +392,18 @@ if __name__ == '__main__':
             elif state == States.SHUTDOWN:
                 shutdown(epd)
             else:
-                cl, cl_status = mavg_cl.add_value(measure(sensor_cl))
-                ph, ph_status = mavg_cl.add_value(measure(sensor_ph))
+                tmp = measure(sensor_cl)
+                if tmp != 0:
+                    cl, cl_status = mavg_cl.add_value(tmp)
+                else:
+                    cl = 0
+                    cl_status = False
+                tmp = measure(sensor_ph)
+                if tmp != 0:
+                    ph, ph_status = mavg_ph.add_value(tmp)
+                else:
+                    ph = 0
+                    ph_status = False
                 clp = get_percent(cl_leer, cl_voll, cl)
                 php = get_percent(ph_leer, ph_voll, ph)
                 display_site_main(epd, clp, php)