Why is PlayerPrefs.DeleteAll() not working?

So in my code I'm using playerprefs to save and load data between scenes, but I want all of the data to be erased when I close out of the game. For this I'm using OnApplicationQuit, which through Debog.Log I've proved gets called when I close the game.

 public void OnDisable()
     {
         PlayerPrefs.SetInt("canUseSpell", canUseSpell);
         PlayerPrefs.SetInt("spd1", spd1SetActive);
         PlayerPrefs.SetInt("spd2", spd2SetActive);
         PlayerPrefs.SetInt("spd3", spd3SetActive);
         PlayerPrefs.SetInt("maxHP1", MaxHp1SetActive);
         PlayerPrefs.SetInt("maxHP2", MaxHp2SetActive);
         PlayerPrefs.SetInt("maxMP1", MaxMp1SetActive);
         PlayerPrefs.SetInt("maxMP2", MaxMp2SetActive);
         PlayerPrefs.SetInt("HpRegen1", HPRegen_1SetActive);
         PlayerPrefs.SetInt("HpRegen2", HPRegen_2SetActive);
         PlayerPrefs.SetInt("MpRegen1", MPRegen_1SetActive);
         PlayerPrefs.SetInt("MpRegen2", MPRegen_2SetActive);
         PlayerPrefs.SetInt("Dex1", Dexterity_1SetActive);
         PlayerPrefs.SetInt("Dex2", Dexterity_2SetActive);
         PlayerPrefs.SetInt("Def1", Defense_1SetActive);
         PlayerPrefs.SetInt("Def2", Defense_2SetActive);
         PlayerPrefs.SetInt("Def3", Defense_3SetActive);
         PlayerPrefs.SetFloat("moveSpeed", moveSpeed);
         PlayerPrefs.SetInt("HPperSec", HPperSec);
         PlayerPrefs.SetInt("MPperSec", MPperSec);
         PlayerPrefs.SetFloat("Dex", fireSpeed);
         PlayerPrefs.SetInt("Def", Defense);
         PlayerPrefs.SetInt("level", level);
         PlayerPrefs.SetFloat("HP", Hitpoints);
         PlayerPrefs.SetFloat("MaxHP", MaxHitpoints);
         PlayerPrefs.SetFloat("MP", Mana);
         PlayerPrefs.SetFloat("MaxMP", MaxMana);
         PlayerPrefs.SetInt("upgradePoints", upgradePoints);
         PlayerPrefs.SetInt("xp", experience);
         PlayerPrefs.SetInt("xpToNextLvl", experienceToNextLevel);
     }
     public void OnEnable()
     {
         canUseSpell = PlayerPrefs.GetInt("canUseSpell", 0);
         spd1SetActive = PlayerPrefs.GetInt("spd1", 0);
         spd2SetActive = PlayerPrefs.GetInt("spd2", 0);
         spd3SetActive = PlayerPrefs.GetInt("spd3", 0);
         MaxHp1SetActive = PlayerPrefs.GetInt("maxHP1", 0);
         MaxHp2SetActive = PlayerPrefs.GetInt("maxHP2", 0);
         MaxMp1SetActive = PlayerPrefs.GetInt("maxMP1", 0);
         MaxMp2SetActive = PlayerPrefs.GetInt("maxMP2", 0);
         HPRegen_1SetActive = PlayerPrefs.GetInt("HpRegen1", 0);
         HPRegen_2SetActive = PlayerPrefs.GetInt("HpRegen2", 0);
         MPRegen_1SetActive = PlayerPrefs.GetInt("MpRegen1", 0);
         MPRegen_2SetActive = PlayerPrefs.GetInt("MpRegen2", 0);
         Dexterity_1SetActive = PlayerPrefs.GetInt("Dex1", 0);
         Dexterity_2SetActive = PlayerPrefs.GetInt("Dex2", 0);
         Defense_1SetActive = PlayerPrefs.GetInt("Def1", 0);
         Defense_2SetActive = PlayerPrefs.GetInt("Def2", 0);
         moveSpeed = PlayerPrefs.GetFloat("moveSpeed", 1);
         HPperSec = PlayerPrefs.GetInt("HPperSec", 1);
         MPperSec = PlayerPrefs.GetInt("MPperSec", 1);
         fireSpeed = PlayerPrefs.GetFloat("Dex", 0.3f);
         Defense = PlayerPrefs.GetInt("Def", 0);
         level = PlayerPrefs.GetInt("level", 0);
         Hitpoints = PlayerPrefs.GetFloat("HP", 800);
         MaxHitpoints = PlayerPrefs.GetFloat("MaxHP", 800);
         Mana = PlayerPrefs.GetFloat("MP", 50);
         MaxMana = PlayerPrefs.GetFloat("MaxMP", 50);
         upgradePoints = PlayerPrefs.GetInt("upgradePoints", 0);
         experience = PlayerPrefs.GetInt("xp", 0);
         experienceToNextLevel = PlayerPrefs.GetInt("xpToNextLvl", 30);
         playerSkills.SetSkillPoint(upgradePoints);
 
 
     }
 
 
 
     public void OnApplicationQuit()
     {
         PlayerPrefs.DeleteAll();
     }

I know this code is pretty ugly but hey, it works. However when OnApplicationQuit gets called, the values for all of my PlayerPrefs don't change back to their default values I have set. Any help or different ways to save this data would be greatly appreciated!