You have to take good care of your removable appliance. Please don’t wrap it with a paper napkin and put it down the table. It can be mistaken as something else and someone might break it and throw it away. Don’t put it in your pockets either because you might accidentally destroy it. Better get a plastic appliance case when you take it off your mouth to keep it secured.
Beware of dogs and cats because they might attempt to chew your removable appliance. Don’t store them in a hot place. Boiling your retainer for the reason of sterilizing it is not advisable. Just bring the appliance to the dental office and they will be glad to disinfect it for you.