This is the official guidance of FEMA.

https://www.ready.gov/sites/default/files/2020-03/nuclear-ex...

> Take a shower or wash with soap and water to remove fallout from any skin or hair that was not covered. If you cannot wash or shower, use a wipe or clean wet cloth to wipe any skin or hair that was not covered.

Do you want Gemini to shower for you or something?