Particles Still Going After Script Is Gone

Hi, I'm a complete newb to scripting, and how it works but, I'm having trouble removing a particle effect from an object. I've deleted the script from it's contents and it's still firing off! What can I do to completely remove this effect?

Or if I've totally messed up, how can I safely remove scripts from things in the future?

Thanks.

Pop this into your prim:

default
{
    state_entry()
    {
        llParticleSystem([]);
    }

    
}

see http://rpgstats.com/wiki/index.php?title=LlParticleSystem

Thanks, I will!