The sound doesn't destroy when the character stops moving

[AnotherHollowDay (Wuulz)]

local debris = game:GetService("Debris")

local character = script.Parent
local rootPart = character:WaitForChild("HumanoidRootPart")
local humanoid = character:FindFirstChildOfClass("Humanoid")

local soundGroup = script.FootStepSounds

db = false

repeat wait(0.1) until humanoid

local function sounds()
	local material = soundGroup:FindFirstChild(humanoid.FloorMaterial.Name)
	if material and not material.Playing and not db then
		local clone = material:Clone()
		if humanoid.MoveDirection.Magnitude > 0 and not clone.Playing then
			if clone and clone:IsA("Sound") then
				clone.Parent = humanoid.RootPart
				clone:Play()
				clone.PlaybackSpeed = humanoid.WalkSpeed / 16
				debris:AddItem(clone, clone.TimeLength)
				db = true
				delay(clone.TimeLength / 1.5, function()
					db = false
				end)
			end
		else
			clone:Remove()
		end
	end
end

while task.wait() do
	sounds()
end

[BlueBloxBlast]

You should do :Destroy() rather than :Remove()