@buddyboy
Try sniffing some coffee beans ground coffee. That works to get rid of some horrible smells, I'm not sure about the flood water stench. Someone needs to try it and report back.
I've also heard that rubbing Vicks Vapor Rub under the nose helps with awful smells while you're being exposed to it. That's what coroners apparently do.
@sammee:
Beans help to clean the senses but it's temporary.
Vicks, if you don't mind breathing mint works great and it stays put.
Regarding detergents TSP works great and is what we used to use to get odor out of fire turnout gear (smoke/mold/other). We would also clean our SCBA masks with it and wouldn't damage other organics such as the rubber face seal. Can be found next to the borax or better in any hardware store.
You do, however have to add it to soap as it's not a surfactant alone. Recipes can be had online.
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