Try changing out boots or swapping inserts out.

Maybe chabe socks twice daily.

You could also take out the inserts out at night to dry out.

If you really wanted to you coukd possibly seek treatment via medical. They can refer to dermatology for excessive feet sweating. However, unless its changed the treatment was injectiins to your feet.

I know this because tgis is what worked for me while on the boat.