I once got one of my 35mm cameras so wet with rain that it stopped working - the film would only reluctantly advance, the internal exposure meter stopped and finally the mirror locked up.

Then the film would then not re-wind - it has managed to "glue" itself to the pressure plate with all the rain water that was now inside the camera

Left the whole thing undisturbed on a radiator to dry out - it took many days for the internal misting to clear.

However, when it fully dried out, neither the film nor the camera had taken any long term harm.

However it was “only” rain water - which is about as pure as you can get.

Having experienced getting a camera and film that wet - I wouldn't recommend it for others to try

Martin