If they are canvas only, no suede, I just remove the insoles and throw them in the washer and let them air dry.
If they have suede, I use a suede safe foaming shoe cleaning product, brand doesn’t really matter. Test on inconspicuous spot first to make sure it’s color fast, like underside of tongue. I use a soft nylon brush, brush in circular motions with the foaming stuff, don’t use more than you need. Dab off extra cleaner with a clean microfiber cloth. Allow to dry overnight. Use something like mink oil to help waterproof and condition.
Any “W” or “L” post honestly