In my site I use the All-in-One Calendar plugin by Then.ly. It shows events from external iCal-feeds. Everything works fine, except for one thing: if the title of an event ends with special characters (e.g. stars), clicking on the Read more button ('Lees meer') results in a 404 error. If I manually remove the stars from the end of the slug, everything works fine.
Example: view on July 25: GWOEMUL / THE HOST ★★★★. Click on it to expand and next click on the 'Lees meer' button. (The slug for this event is "../gwoemul-the-host-★★★★/..")
My question: how do I automatically remove special characters (or make them work!) from the slugs that contain them?
Thanks for your help!