The buttons on my PSP 2000 are quite mushy. Is there any way to alleviate this issue? A case from Deal Extreme came with my purchase, but I'm not very impressed with it. Are the PSP 2000 buttons normally mushy? Is there any way I could treat the rubber on the buttons to stiffen them? or any modifications? Options? Compared to the nice click of say a 3ds or even DS, the PSP buttons seem really mushy.