i have a 4-year old PS2 (the original big black one) and since then it hasn't bog down or had any errors in reading my games,etc. it's "untouched" meaning it hasn't been modified and it's an original PAL version. my question is: do i need to "update" the software of my PS2? and do you guys advice cleaning the inside by running a CD cleaner or something? any other advice or sugestions on this subject matter?