Help with TouchEnded event?

I was making a script where if a Character touches the part it will turn half transparent and then it will go back to normal if he leaves the part but it won't go back to normal,why?

local Part = script.Parent
local Touched = false--Debounce

    Part.Touched:connect(function(TouchedPart)
        Touched = true
        FoundHumanoid= TouchedPart.Parent:FindFirstChild("Humanoid")--Checks if it's a humanoid
                if not FoundHumanoid then
                    print("You're not a Character "..TouchedPart.Name.." !")
                    Touched = false
                else
                    if not Touched then
                        print("I haven't been touched!")
                        Part.Transparency = 1
                    else
                        Part.Transparency = 0.5
                         print("I've been touched")
						Touched = false
                end 
            end
    end)

I think you need to put both Part.Transparency's as 0.5.