There are various wipes etc that claim to be anti-fog, but I've found any effect to be temporary, at best.

Does anybody remember the BMW System 2 heated visors?
Back in the 80s I think it was, well before anybody invented pinlocks and the like.
They really were the best thing to aid biker’s vision in cold and damp conditions. They had very fine wires embedded in the visor which you couldn’t see when you were wearing it but some idiot decided that the wires impeded your vision and they were withdrawn from sale.
Good to see something similar is back on the scene.