You use the humble kitchen sponge to clean your dishes after every meal, but it may be spreading more germs than you realise. An old sponge harbours an average of over 10 million germs per square metre (okay, we know your sponge is probably way smaller but the idea of a million germs is equally gross). If you use your sponge daily, try to replace it every week! Also, if you are using the sponge to scrub the toilet, throw it away immediately after use.
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