Why does my arrow goes through parts? \ Touched not firing?

I made a simple bow script, when shot the arrow goes forward in a simple while loop and stop when hits something, but i noticed that the Touched does not fire when the arrow hits any part in the workspace, but still fires when the arrow hits players. I have no idea why is it happening. HELP?

local tool = script.Parent.Parent
local Necronomicon = require(game.ServerStorage.Necronomicon)
local Animator = game.ReplicatedStorage.Animator
local RemoteFunction = game.ReplicatedStorage.RemoteFunction
local character
local player
local canActivate = true
local cooldown = 2
local damage = 1
local brickdamage = 1
local Debris = game:GetService("Debris")


tool.AncestryChanged:Connect(function(ancestry)
	if tool.Parent:FindFirstChild("Humanoid") then
		character = tool.Parent
		player = game.Players:GetPlayerFromCharacter(character)
	end
end)

tool.Equipped:Connect(function(mouse)
	if player then
		Animator:FireClient(player, "HoldingBow")
	end
end)

tool.Unequipped:Connect(function()
	if player then
		Animator:FireClient(player, "StopHoldingBow")
	end
end)

local hitDebounce = true
local attacking = false
local putting = false

tool.Activated:Connect(function()
	if canActivate == true and putting == false then
		attacking = true
		canActivate = false
		local arrow = game.ServerStorage.Items.Sub.KoSSArrow:Clone()
		local mousePos, mouseLV = RemoteFunction:InvokeClient(player, "mouse")
		local mouse = CFrame.new(mousePos, mouseLV)
		character.HumanoidRootPart.CFrame = CFrame.new(character.HumanoidRootPart.Position, mouse.Position)
		Animator:FireClient(player, "FireBow")
		script.Parent.AttackSound:Play()
		arrow.CFrame = character.HumanoidRootPart.CFrame + character.RightHand.CFrame.LookVector * 1
		arrow.CFrame = CFrame.new(arrow.Position, mouse.Position) -- lookAt
		arrow.Parent = workspace
		script.Parent.AttackSound:Play()
    	local hited = false
		local touch = arrow.Touched:Connect(function(hit)
			if hit.Parent ~= tool.Parent and hited == false 
			and hit.Name ~= "Handle" and hit.Parent ~= tool then
				hited = true
				print("hit")
				if hit.Parent:FindFirstChild("Humanoid") or hit.Parent.Parent:FindFirstChild("Humanoid") then
					script.Parent.Hit:Play()
					Necronomicon.ToolDamage(hit, tool, 20, 1)
					arrow.Anchored = false
					arrow.Parent = hit
					local weld = Instance.new("WeldConstraint", arrow)
					weld.Part0 = arrow
					weld.Part1 = hit
				else
					script.Parent.Arrow:Play()
				end
				arrow.Trail.Enabled = false
				Debris:AddItem(arrow, 10)
			end
		end)
		delay(cooldown, function()
			hitDebounce = true
			canActivate = true
			attacking = false
		end)
		arrow.CFrame = CFrame.new(arrow.Position, mouse.Position) -- lookAt
		arrow.Part.Position = arrow.Position
		spawn(function()while hited == false do -- arrow model is anchored
				arrow.CFrame = arrow.CFrame + arrow.CFrame.LookVector * 0.5 -- goes forward
				wait()	
			end
			touch:disconnect()
		end)
	end
end)

Solved. Learned that if the arrow is Anchored, it wont detect touch with other Anchored parts. Its a rule of touched event. A better way to make an arrow script is using BodyVelocity.