The best way to prevent stains from returning in the future is by using a stain remover that is specifically designed for the type of stain. There are two types of stain removers - liquid and dry. The liquid type is a more effective and faster way to remove stains. The dry type is more cost-effective but requires more effort, time, and labor. The best way to prevent stains from returning in the future would be by using a specific stain remover designed for the type of stain.