Whats causing my script to not produce any results?

Hello, recently i've been working on a fire and water script in which someone jumps into lava and takes damage, then jumps into the water and clears all the effects from the fire. This is my script for both.

local firePart = script.Parent
local Players = game.Players

firePart.Transparency = 1

local Lava = function(hitPart)
    if hitPart.Parent:FindFirstChild("Humanoid") then
        hitPart.Parent.Humanoid.Health = hitPart.Parent.Humanoid.Health - 3

        if hitPart.Parent.Humanoid.Health > 0 then
            local Parts = hitPart.Parent:GetChildren()
            for i, Parts in pairs(Parts) do
                if Parts:IsA("BasePart") then
                    Instance.new("Fire", Parts)
                    Instance.new("Smoke", Parts)

                end
            end

        end
    end
end

firePart.Touched:Connect(Lava)

thats my Fire script, and this next one is my water script

local waterPart = script.Parent
waterPart.Transparency = 1
local function PutOutFire(part)
local   human = part:FindFirstChild("Humanoid")

for i, human in pairs(human) do
    if human:FindFirstChild("Smoke") then
        human:FindFirstChild("Smoke"):Destroy()

    end
    if human:FindFirstChild("Fire") then
        human:FindFirstChild("Fire"):Destroy()
    end
end
    end
waterPart.Touched:connect(PutOutFire)

I am not sure where am going wrong, I don't get any errors, but the smoke and fire effect from the fire script doesn't leave even after I jump into the water. What do I need to change, and how can I make this better? Help will be much appreciated.