When you want help with your plugin, please respect this: Make a proper title! Such as "How to add and remove player effect via plugin" Add code that you've done. (Best for full code, or code of that certain section only). That way we can see what you've done wrong, and to help us to help you. add a description. That way it helps us to help you. It helps us to understand what you want. Try for a little research before you post the question. There may be similar issues to the one you have.