Pesach Questions

Last year was the first time I had a self-cleaning oven (we'd purchased it during the previous year) and using it to kasher the oven for pesach was a bit of a disaster. Can I just do what I used to do before I had a self-cleaning oven and just clean it with oven cleaner and then put it to the highest temp it goes for a couple of hours? Please let me know what you think.

Yes you may do what you have done in the past. Clean all surfaces (walls, floor, doors and racks) thoroughly and then do not use the oven for 24 hours. With the racks in the oven, turn to broil (highest heat) for 60 minutes.