What is the reason for the high radiation dose in the dryer?

Radiation is invisible, but you can measure the amount of radiation around you by using a device such as a Geiger counter. The physics-related Q & A site `` Physics Stack Exchange '' reports that `` when the dose in the clothes dryer was measured, it was higher than the average dose in the house.

Why is my dryer radioactive? - Physics Stack Exchange
https://physics.stackexchange.com/questions/764460/

Physics Stack Exchange user Marsroverr reported on the high radiation dose in the dryer. Marsrover got a Geiger counter and measured the radiation dose at home. As a result, the average radiation dose at home was 0.09 to 0.11 microsieverts/hour, while the radiation dose 'inside the dryer immediately after drying the clothes with still clothes' was 0.16 to 0.18. A high radiation dose of microsieverts per hour was recorded.

Mr. Marsrover speculated that the reason why the radiation dose in the dryer was high was related to the radioactive substance `` radon '' that is widely present in the natural world, but he could not deepen his consideration further. So Marsroverr posted a question on the Physics Stack Exchange.

The answer that received the most positive evaluations at the time of writing the article is from Mr. Rob, who has worked at the Los Alamos Neutron Science Center in the United States. Because radon is found in granite and concrete, radon is present indoors in typical homes. According to rob, radon has the property of being attracted to statically charged objects. For this reason, radon was attracted to statically charged clothes in the dryer, and the phenomenon of ``the radiation dose in the dryer increased'' occurred.

The fact that radon is attracted to static electricity is also used in scientific experiments, and there is an example of using static electricity to collect radon in the atmosphere in Japan.

Nuclide identification of natural radon by electrostatic collection
https://doi.org/10.11484/jaea-technology-2008-052

In addition, Mr. Rob said that he had the experience of `` exceeding the standard value of radiation dose '' when working at the Los Alamos Neutron Science Center. The engineer who dealt with exceeding the reference value paid attention to the fact that `` Mr. Rob was sitting on a plastic chair '' and said, `` As a result of the chair rubbing against the pants and the pants being charged with static electricity, the pants were radioactive. I have attracted substances,” he concluded.