Sponges are a breeding ground for bacteria, including E. Coli and salmonella since they’re typically moist and porous. A bacteria and germ free sponge is key for a hygienic kitchen. Morning Fresh Antibacterial fights germs on the sponge for up to 48 hours*, protecting your sink and sponge from germs with maximum antibacterial protection. For maximum antibacterial effect, squirt directly on the sponge. *Reduced bacteria by 1,000 times when dosed directly onto the sponge and was still effective when tested after 48 hours.