Can you reset the T9 Dictionary? - 6230i

Hey everyone,

I stupidly lent my phone to my girlfriends brother and he keyed in a pile of absolute crap into my T9 dictionary so now I've all sorts of retarded slang coming up when I'm trying to text. I'm ready to throw the phone through a window because I hate that kind of talk. Is there any way to reset the T9 dictionary? As in, remove all words added since purchase. I tried restoring factory settings which turned T9 off, and made the text size big but didn't affect the damn dictionary.

Regards,
KD.