One of our biggest pet peeves are stinky sponges! We stopped buying grocery store sponges years ago, and switched over to these hand made scrubbies. These are very durable. One will last about 6 months, and some of our customers say 12 months! They are safe on all surfaces. After a few days, simply throw in the top rack of the dishwasher or throw in the washing machine, and air dry.