cleaning out livewell

what should I use to clean out my livewells? Just don't want to put any chemicals in it that may damage them or hurt the fish. should I just use regular soap and water, or what? Thanks

water and a Mr. Clean magic eraser

I use water and baking soda. It works great.
You can also use peroxide

I just rinse mine heavily after using soap and water. Add a tablespoon of vanilla extract afterwards eliminates any fish smell too and doesn't harm the fish.