Anything that I can do about sweaty palms?

Well whenever I play videogames, I play them online where you play versus people online (xbox live) and I was wondering what I can do about my sweaty hands cause it makes my hands and controller feel very wierd. But whenever I'm doing anything else like holding hands with my girlfriend or something my hands are... show more Well whenever I play videogames, I play them online where you play versus people online (xbox live) and I was wondering what I can do about my sweaty hands cause it makes my hands and controller feel very wierd. But whenever I'm doing anything else like holding hands with my girlfriend or something my hands are perfectly fine. Is there anything I can do so they dont sweat (Treatments or things i can do)
I don't really wanna buy anything for it but if i do need to then i might.

I heard something about some tea before?
Update: Edit: I'm 19 if that helps.
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