How to remove poop smell from room?

I'm temporarily living with a friend and the bedroom I'm staying in has a terrible odor. Apparently the people who lived there prior let their animals poop all over the house. The smell literally keeps me awake at night. I have tried the scented baking powder/vacuum product which help for a few days. I have... show more I'm temporarily living with a friend and the bedroom I'm staying in has a terrible odor. Apparently the people who lived there prior let their animals poop all over the house. The smell literally keeps me awake at night. I have tried the scented baking powder/vacuum product which help for a few days. I have sprayed the carpet with Lysol. I have a plug-in air freshener that doesn't seem to help at all. I'm afraid to try vinegar or peroxide because I don't want to discolor the carpet. There aren't any stains so I can't even pinpoint where the odor is coming from. My guess is it's somewhere in the padding. Any advice at all would be greatly appreciated!
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