Hi..I have zero experience with the bell..sorry..but Jake was so easy I still can't believe it! We found that "his mistakes" were really OUR mistakes..either we weren't watching close enough or ignored his trips to the door! I just took him out a cole times an hour and right after eating..drinking..and playing! Are you crate training her? That really made a difference! It sounds like she is doing great and I'd say just keep reenforcing what you have taught her already.