J.F.
We used the same 3 day method with our daughter at 25 months. It was an exremely messy process, but it worked! The night time took much longer to "click" and she woke up with accidents After a month, I gave up on night time and switched to pull-ups. When she woke up with dry pull-ups consecutive mornings, we had a talk about keeping her underwear dry at night and switched to underwear. It worked!