Why buy a SKURA Sponge? Skura Style is taking sponge technology to the next level. Skura's signature monogram and smart color scheme look fresh, while the antimicrobial technology inhibits the growth of odor-causing bacteria, mold & mildew, so they never smell. The foam dries quickly & the scouring surface doesn't trap food & rinses clean. It's also safe on a wide range of kitchen surfaces; Skura won't scratch pots or pans but is still tough enough to scrub through the grime. Plus, we've made it easy to know when it's time to swap out your sponge for a new one with fade-to-change technology. The average kitchen sponge can be 200,000 times dirtier than a toilet seat. While there are bacteria in both bathroom & kitchen, the most contaminated sites are those that stay moist & are touched frequently, like things around the kitchen sink and cellulose sponges. That's why more bacteria were found on sponges and dishcloths than toilet seats. SKURA's polyurethane foam always has less bacteria than cellulose sponges. If a sponge doesn't stink, is it safe to assume it's germ-free? No! Salmonella and E. coli do not have an odor, so just because your sponge is odorless it doesn't mean it's free of all bacteria. Polyurethane foam significantly reduces the spread of E.coli, decreasing the risk of infection by up to 90% when compared to a traditional cellulose spongeWhat is the SKURA difference? In our study, polyurethane sponges like our patented SKURA foam, always had fewer total bacteria, including E. coli, than cellulose sponges. Cellulose, however, dominates in the American market despite the clear benefit of polyurethane. How often do you recommend that people replace their sponges? Germs really start to multiply in about seven to eight days. Research studies have shown that microwaving or running through the dishwasher will not kill all the harmful bacteria.