After you are completed with the braces or aligners procedure, you need to wear a Hawley retainer. And, if you do not want them to get stains that will be visible, you must clean them efficiently. There are a few things that you should avoid while cleaning retainers, like avoid brushing with baking soda, using bleach for cleaning retainers, using hot water, and more. China Orthodontic Laboratory is one of the leading laboratories you can contact to get Herbst appliance.