Health Gui Remover?

while true do

for inx, val in pairs(game.Players:GetPlayers()) do 
if val:FindFirstChild("PlayerGui") then 
if val.PlayerGui:FindFirstChild("HealthGUI") then 
val.PlayerGui.HealthGUI:Remove() 
end 
end 
end 

wait()
end

The Health Gui won't remove? There must be update.