When my last phone took an unsanctioned swim, my research suggested that a food dehydrator is a last resort. It risks forcing water vapour further into the electronics of the system, rather than encouraging it to move out.

I did find a clever solution online that tried to induce mechanical suction on your phone to force the vapour out, but it was too expensive for a one off use.

In the end I had to resort to the food dryer anyway, after the silica gel failed to work.

I've never used it for drying wet electronics. The couple of times I've dunked my phone, I've just let it air-dry for a couple of days and it's been good.

I use silca gel for storing 3D printing filament and long-term clothes storage.