Pee pee smell

My LO has been sleeping 11-12 hours at night for some time now but ever since she has been sleeping on her stomach we wake up to a diaper that has leaked and her whole room smells like pee including the sleep sack. The sleep sacks I have for her are the “Kyte” brand and are expensive so I only have two. I feel like I wash them every single day!!!! What are you guys doing so you don’t have a leaky diaper and how do you keep their room from smelling like pee!!!