Alright, so my iPod has been running quite slow and resprings take around 1 minute and the wheel doesn't stop spinning until after around 30 seconds. It used to only be around 5 seconds. My thought, was to go into Cydia and remove MobileSubstrate (and therefore removing all mobile substrate addons). I could then sort of start fresh and download the only things that I need. Would this harm my iPod in any way?