diff --git a/python/gilded_rose.py b/python/gilded_rose.py
index d87fd3f2..db497f72 100755
--- a/python/gilded_rose.py
+++ b/python/gilded_rose.py
@@ -13,36 +13,37 @@ class GildedRose(object):
             self.__update_each_item_quality(item)
             # print(f'Log: {item}\n')
 
+    def __decrease_item_quality(self, item, amount: int = 1):
+        item.quality = max(0, item.quality - amount)
+
+    def __increase_item_quality(self, item, amount: int = 1):
+        item.quality = min(50, item.quality + amount)
+
     def __update_each_item_quality(self, item):
         # Update item.sell_in
-        if item.name != self.SULFURAS:
+        if item.name == self.SULFURAS:
+            pass
+        else:
             item.sell_in = item.sell_in - 1
         # Update item.quality
-        if item.name != self.AGED_BRIE and item.name != self.BACKSTAGE_PASSES:
-            if item.quality > 0:
-                if item.name != self.SULFURAS:
-                    item.quality = item.quality - 1
+        if item.name == self.AGED_BRIE:
+            self.__increase_item_quality(item)
+            if item.sell_in < 0:
+                self.__increase_item_quality(item)
+        elif item.name == self.BACKSTAGE_PASSES:
+            self.__increase_item_quality(item)
+            if item.sell_in < 10:
+                self.__increase_item_quality(item)
+            if item.sell_in < 5:
+                self.__increase_item_quality(item)
+            if item.sell_in < 0:
+                item.quality = 0
+        elif item.name == self.SULFURAS:
+            pass
         else:
-            if item.quality < 50:
-                item.quality = item.quality + 1
-                if item.name == self.BACKSTAGE_PASSES:
-                    if item.sell_in < 10:
-                        if item.quality < 50:
-                            item.quality = item.quality + 1
-                    if item.sell_in < 5:
-                        if item.quality < 50:
-                            item.quality = item.quality + 1
-        if item.sell_in < 0:
-            if item.name != self.AGED_BRIE:
-                if item.name != self.BACKSTAGE_PASSES:
-                    if item.quality > 0:
-                        if item.name != self.SULFURAS:
-                            item.quality = item.quality - 1
-                else:
-                    item.quality = item.quality - item.quality
-            else:
-                if item.quality < 50:
-                    item.quality = item.quality + 1
+            self.__decrease_item_quality(item)
+            if item.sell_in < 0:
+                self.__decrease_item_quality(item)
 
 
 class Item: