my 3gs iphone has been jailbroken for quite sometime now.
i feel that it runs slow and kinda buggy.
it was jailbroken with Blackra1n on FW 3.2.1
then updated to 4.0 and jailbroken with


i want to know how i am able to delete old cydia files that stayed in the system
after i restored and jailbroke for the second time.
it says my available space is 94 mb.
but on itunes it says i have 25.6 gigs.

how can i delete old cydia theme files, caches, and other junk i dont need?
i have DiskAid and i can look at all these files.
i just dont want to go on a deleting rampage and get rid of files i need.

thanks for your help! :]