Hi, Recently i bought a secondhand Trace Elliot 208. The cab seems to have collected a bit of dust on the speakers and i want to clean them with a soft cloth. Does anyone know how to remove the grill? The screws on the front seem to be fake screws. Do i need to pull the grill somewhere to remove it? I emailed Trace Elliot about this, but they did not reply. Thanks in advance for your help.