I Can Talk About How It Got Contaminated. If you are using Toolbox, it may be infected by some dangerous objects!
If You Say How To Clean Up, My Code Is Ready! Type this in the Run Command Section and press the ENTER Key!
Code:
for _,x in pairs(workspace:GetDescedants()) do
if x:IsA("Script") or x:IsA("Fire") or x:Isa("LocalScript") then
x:Destroy()
end
end