diff --git a/actuators.py b/actuators.py
index 8f0a683..cd18f09 100644
--- a/actuators.py
+++ b/actuators.py
@@ -99,4 +99,6 @@ actuators = {
                wattage=12*0.4),
     'humidifier': PIN(pin=17, initial=GPIO.HIGH, onstate=GPIO.LOW, offstate=GPIO.HIGH,
                       wattage=25),
+    'heater2': PIN(pin=17, initial=GPIO.HIGH, onstate=GPIO.LOW, offstate=GPIO.HIGH,
+                      wattage=2000),    
 }
diff --git a/recipes.json b/recipes.json
index 451a657..899c71e 100644
--- a/recipes.json
+++ b/recipes.json
@@ -94,15 +94,22 @@
       "name": "Yogurt",
       "description": "Lascia raffreddare lo yogurt per fare l'inoculo, mantiene a 42 gradi fino a che è pronto, e poi porta a 4 gradi.",
       "controllers": [
-          "(make-duty-controller \"heater\" 0.20 120 '<)"
+          "(make-duty-controller \"heater2\" 0.10 120 '<)"
           "(make-duty-controller \"freezer\" 0.20 120 '>)"
       ],
       "phases": [
+          {
+          "name": "Prepare",
+          "description": "Turn Fan On",
+          "exit_condition": "#t",
+          "on_load": "(set-actuator \"fan\" #t)",
+          "on_exit": "#t"
+      },
           {
           "name": "Cool",
           "description": "Cool to 46°C",
           "exit_condition": "(and (< (get-sensor \"T_food\") 46.0)\n(> (get-sensor \"T_food\") 42.0))",
-          "on_load": "(begin (set-controller \"heater\" \"T_food\") (set-target \"T_food\" 46.0) (set-controller \"freezer\" \"T_ext\") (set-target \"T_ext\" 46.0))",
+          "on_load": "(begin (set-controller \"heater2\" \"T_food\") (set-target \"T_food\" 46.0) (set-controller \"freezer\" \"T_ext\") (set-target \"T_ext\" 46.0))",
           "on_exit": "#t"
       },
           {
@@ -114,15 +121,15 @@
       },
           {
           "name": "Hold",
-          "description": "Keep at 42°C for 3h",
-          "exit_condition": "(> (time-in-this-phase) (hours 3))",
+          "description": "Keep at 42°C for 4h",
+          "exit_condition": "(> (time-in-this-phase) (hours 4))",
           "on_load": "(begin (set-target \"T_food\" 41.0) (set-target \"T_ext\" 41.0))",
-          "on_exit": "(notify \"You can remove the yogurt from the heater\")"
+          "on_exit": "(notify \"The yougrt is ready\")"
       },
           {
           "name": "Refrigerate",
           "description": "Lower temperature to 4gradi",
-          "exit_condition": "#f",
+          "exit_condition": "(manual-intervention \"Rimuovi lo yogurt\" '((\"Fatto\" #t)))",
           "on_load": "(begin (set-target \"T_food\" 4.0) (set-target \"T_ext\" 4.0))",
           "on_exit": "(notify \"You can remove the yogurt from the heater\")"
       }
diff --git a/sensors.py b/sensors.py
index d476d6c..ccc4256 100644
--- a/sensors.py
+++ b/sensors.py
@@ -182,7 +182,7 @@ class Sensors():
             'T_ext':      SHT40('Temperature'),
             'H_ext':      SHT40('Humidity'),
             'heater':     GPIOState(22),
-            'humidifier': GPIOState(17),
+            'humidifier/heater2': GPIOState(17),
             'fan':        GPIOState(27),
         }