How old is Biggie? Often times, puppies have retained baby teeth that need to be pulled that causes terrible breath. If that's the case, you can just brush them and then when he gets neutered, he may have to have some pulled if they don't fall out on their own.
But I use Petzlife gel for maintenance approx. once or twice a week. Just rub a little gel on both sides and it keeps the teeth clean, and breath fresh.
Plus brushing with doggy toothpaste. I'm terrible at that, though, lol. He only gets his teeth brushed once every 2 weeks or so.