The first time I used hot gloves, It was summer time and I had a heck of a time getting the sweaty, sticky liners off my hands. I went right out and bought a bottle of talcum powder. The only stuff I could find (I didn't really look to hard) was scented.
I've been through a couple of pair of gloves but I still have the same smelly bottle of talcum powder in my glove bag. I always sprinkle some in the gloves and smell like perfume the rest of the day.
I know what you mean... in warm weather the gloves can stick so badly when trying to remove them that I sometimes feel like Jacques Cousteau trying to peel an octopus off his facemask.
The knit summer liners just seem to get soaked with sweat so other than adding to a greater loss of dexterity, they don't really do much for me.
BTW, the label lists talc as the main ingredient in glove dust, so that's probably all it is.