you could always go for some botox sessions....tiz a tad £££ though!
it paralyses the sweat glands so they dont er....sweat?
hey presto no patches....however if you dont sweat, you heat up more, so in theory could cook yourself?
its worse when sweat gets in your eyes, especially if you cram you helmut on and you wear some for of gel.....stingy stingy ;)