Avoid cross-contamination by washing your hands thoroughly and giving different sponges their own jobs. It's possible to decontaminate a sponge in the microwave if it's wet and generates a good amount of steam. Putting sponges through the dishwasher is also effective. But if they smell bad, you should probably just throw them away.
This article is free and was co-authored by one of the people quoted here. https://pubmed.ncbi.nlm.nih.gov/26060060/