Coffee Machines Stock Germs, Say Scientists

Coffee machine making an espresso. AFP photo
Coffee machine making an espresso. AFP photo
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Coffee Machines Stock Germs, Say Scientists

Coffee machine making an espresso. AFP photo
Coffee machine making an espresso. AFP photo

Scientists have found that all kinds of pathogens gather in coffee grounds and in used pod machine capsules.

According to the German News Agency (DPA), Fritz Titgemeyer, head of the Food Microbiology Laboratory at the Munster University of Applied Sciences in Germany, said that damp coffee grounds encourage the growth of germs.

If you leave a used coffee pod in the machine for a few days before throwing it out, some mould spores may remain in there and you may be adding them to your next brew.

Titgemeyer noted that a heat-stable poison may have developed, a so-called mycotoxin, and you will not be able to see or taste it.

The water containers and the plastic tubes in coffee machines are also a perfect breeding ground for bacteria if they are not cleaned properly. The expert said that bacteria can settle there in the form of biofilms. All removable components need to be cleaned thoroughly.

Titgemeyer added however disgusting it may be to imagine one's coffee machine full of microorganisms, they do not really pose a health risk.

"The water is heated to 80 degrees Celsius, which kills any germs present in the water tank," he said.

If you use the machine to make cold drinks, however, you may need to worry. Titgemeyer explained that in cold-extracted drinks like iced tea or iced coffee, all germs will remain. The good news is that many coffee machines include a self-cleaning program, but there are also extra things you can do to make sure you keep the germs at bay.



US Tourist Arrested for Landing on Forbidden Indian Tribal Island

People sit outside medical stores along a street in Varanasi, India, on April 3, 2025. (Photo by Niharika KULKARNI / AFP)
People sit outside medical stores along a street in Varanasi, India, on April 3, 2025. (Photo by Niharika KULKARNI / AFP)
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US Tourist Arrested for Landing on Forbidden Indian Tribal Island

People sit outside medical stores along a street in Varanasi, India, on April 3, 2025. (Photo by Niharika KULKARNI / AFP)
People sit outside medical stores along a street in Varanasi, India, on April 3, 2025. (Photo by Niharika KULKARNI / AFP)

Indian police said on Thursday they had arrested a US tourist who sneaked onto a highly restricted island carrying a coconut and a can of Diet Coke to a tribe untouched by the modern world.

Mykhailo Viktorovych Polyakov, 24, set foot on the restricted territory of North Sentinel -- part of India's Andaman Islands -- in a bid to meet the Sentinelese people, who are believed to number only around 150.

All outsiders, Indians and foreigners alike, are banned from travelling within five kilometers (three miles) of the island to protect the Indigenous people from outside diseases and to preserve their way of life.

"The American citizen was presented before the local court after his arrest and is now on a three-day remand for further interrogation," Andaman and Nicobar Islands police chief HGS Dhaliwal told AFP.

Satellite photographs show a coral reef-fringed island -- stretching to some 10 kilometers (six miles) at its widest point -- with thick forest and white sand beaches.

The Sentinelese last made international headlines in 2018 after they killed John Allen Chau, 27, an American missionary who landed illegally on their beach.

Chau's body was not recovered and there were no investigations over his death because of the Indian law prohibiting anyone from going to the island.

India sees the wider Andaman and Nicobar Islands as strategically sited on key global shipping lanes. They are closer to Myanmar than mainland India.

New Delhi plans to invest at least $9 billion to expand naval and air bases, troop accommodations, the port and the main city in the region.

Dhaliwal said Polyakov kept blowing a whistle off the shore of North Sentinel Island for about an hour to attract the tribe's attention before he went ashore.

"He landed briefly for about five minutes, left the offerings on the shore, collected sand samples, and recorded a video before returning to his boat," Dhaliwal said.

"A review of his GoPro camera footage showed his entry and landing into the restricted North Sentinel Island."

Police said Polyakov was arrested late on Monday, about two days after he went ashore, and had visited the region twice in recent months.

He first used an inflatable kayak in October 2024 but was stopped by hotel staff, police said on Thursday. Polyakov made another unsuccessful attempt during a visit in January 2025.

This time Polyakov used another inflatable boat with a motor to travel the roughly 35 kilometers (22 miles) of open sea from the main archipelago.

The Sentinelese, whose language and customs remain a mystery to outsiders, shun all contact and have a record of hostility to anyone who tries to get close.

A photograph issued by the Indian Coast Guard and Survival International two decades ago showed a Sentinelese man aiming a bow and arrow at a passing helicopter.

Indian authorities have prosecuted any locals who have aided attempts to enter the island and are trying to identify anyone who may have helped Polyakov.

The Andamans are also home to the 400-strong Jarawa tribe, who activists say are also threatened by contact from outsiders. Tourists have previously bribed local officials in a bid to spend time with the Jarawa.