A tip I learned back when I was despatching. When you can't handle any more, pull into a service station and hold your gloves under a hand dryer. Try to guide the air to the inside, not the outside. It won't totally dry them off, but they'll feel a bit dryer and (more importantly) they'll be warm for a while.
I can't see what type of bike you've got, but if you can get at the cylinder block (I used to ride BMW Boxers, so the cylinders were easily accessible) there's another trick you could try. I to get a tin of beans with chipolatas in, poke a couple of small holes in the top for expansion, wrap it thoroughly in tin foil and wire it with the holes upwards to the cylinder block. By lunchtime, you'll have a nice hot meal ready 😀
Good luck, and have a safe ride !
Man, that idea to use the hands dryer made my day because it have me anymore idea: to use my hotel room hair dryer to dry all my gears (gloves, boots, ...) including my socks! The last one wasn't a good idea because it now smell a bit in the room 😷 😂
Thank you for sharing such great trick.