How to properly clean clear retainers?

I've been brushing my clear retainers with cold water, toothpaste, and a soft toothbrush. People have told me, though, that this is too rough for them. (It scratches them, warps them, etc.) I've also tried baking soda soaks, but some have told me this is bad as well. What have you guys done in the past... show more I've been brushing my clear retainers with cold water, toothpaste, and a soft toothbrush. People have told me, though, that this is too rough for them. (It scratches them, warps them, etc.)
I've also tried baking soda soaks, but some have told me this is bad as well.
What have you guys done in the past that is recommended for cleaning clear retainers? Thanks.
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