I have a pair of these wonderful headphones. My only problem is the ear pads. They seem partly deflated for lack of better terms. This causes my ear to rub on the metal grate where the inner speakers are. Along with the weight of the headphones it rubs my ears too much and I can't wear them for long. Can anyone help me figure out how to make the ear pads become full again? Do I need to inject silicone? How do I do that? Where can I get any items like this? I don't want to shell out 100 bucks for the new Koss Pro 4AA's. I got these for 25 bucks and they sound great...only problem is he padding. PLEASE HELP! Also: Can anyone tell me what the comparator (Blue side) and the ambiance expander (Red side) do?