"Your Roses Really Smell Like Poo!"

So I need help. Grace has a great trash can for her diapers. It's a Diaper Champ and we really like it. The thing is is that it smells. Smells bad. When ever we change the bag, we make it a point to Lysol and disinfect the whole thing. But when you walk into Grace's room or even our apartment, you can smell it. Does anyone have suggestions on how this can smell better?