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Why are Sponges Full of Germs? Easily Explained

A sponge is intended for cleaning objects. But why sponges often have the opposite effect, as they are full of germs, we explain in the following home tip.

Sponges: Ideal conditions for germs

  • The household kitchen sponges in particular are breeding grounds for germs and can sometimes even cause diseases.
  • According to studies, the density of bacteria in a sponge can correspond to more than 5 times 1010 cells per cubic centimeter.
  • The reason for such a high number is that the pathogens find ideal living conditions in the dishwashing sponges.
  • The sponges are mainly made of foam, such as B. Polyurethane. The countless pores create a very large inner surface, which offers the microorganisms plenty of space to multiply.
  • Another reason is that the microorganisms in the sponges have a lot of moisture and warmth, which allows the germs to develop optimally.
  • In addition, food residues always remain in the sponges. This allows the germs to develop excellently.
  • It is important to know that a normal wash, even with hot water, does not do much good. The germs remain in the sponge.
  • Scientists recommend not cleaning the kitchen sponges but changing the dishwashing sponge regularly.
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Written by John Myers

Professional Chef with 25 years of industry experience at the highest levels. Restaurant owner. Beverage Director with experience creating world-class nationally recognized cocktail programs. Food writer with a distinctive Chef-driven voice and point of view.

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