Sani-Cast Cast Cleaning and Itching Cast Relief Sani-Cast is a unique new innovative product that can make wearing a cast more comfortable. Wearing a cast can often be very irritating due to cast itch or unpleasant odors coming from your cast. Basically, the build-up of bacteria is causing a smelly cast and making your skin itchy under the cast. The only real way to make it better is to get in there and clean it. Sani-Cast provides you the tools you need to refresh your skin and help stop an itching cast. Sani-Cast also cleans and kills bacteria that cause a smelly cast.