Why is my touched event not detecting properly?

Hey there.

So I'm making a tool, that when activated, does damage to a player when the handle of the tool is touching him. I'm also trying to do it in a way that only a one hit is detected when you activate the tool so that the player doesn't die immediately.

But for some reason what happens is that the hits on a player are very rarely detected. Like sometimes it detects and sometimes it doesn't.

I'll be really glad if someone could help me.

Here is the script:

local tool = script.Parent

local handle = tool.actualHandle

local targetHumList = {}

handle.Touched:Connect(function(part)
    if part.Parent:FindFirstChildWhichIsA("Humanoid") then
        local targetHum = part.Parent:WaitForChild("Humanoid")

        if targetHum and targetHum.Health > 0 and
            table.find(targetHumList, targetHum) == nil then

            table.insert(targetHumList, targetHum)
            targetHum:TakeDamage(10)
        end
    end
end)


tool.Activated:Connect(function()
    targetHumList = {}
end)