Welcome to the forum.
Sadly rice is not a great idea, unless it is a bag so dust can’t get into the phone. The phone ideally would be in a cool to warm flow of air for a day or more, and disassembled.
It is difficult for air to get into the modules hence the time it takes.
Use the iFixit guide to disassemble.
You may find red square that indicate water ingress, if this is the case then the warranty is void and you can go past step 7 in the iFixit guide.
Further see this page of links to other cases.
https://forum.fairphone.com/search?q=water
On a positive note, my daughter dropped her FP3 in the toilet and after drying it twice over a few days it has been working for over a year with the red square.
Warm air is very humid, a wet pocket next to your body is a dangerous place for unsealed electronics.