Hello. I am new here and have a question. I have the Logitech Z-5500 speakers. I was wondering, after I take off the 4 allen screws off the grill, how do I get the grill off the subwoofer? It just doesn't come off, and I don't wanna tug on it. I emailed Logitech and they said it could void the warranty, and would not give me an answer. Any help is thanked for.