I was training with a friend today ,the weather was extremely hot , he is about 24 pounds heavier than me , after 1 hour of worm up/ bag fighting / standup fighting , I suggested that we wrestle as i thought since he is the heavier guy i would benefit from wrestling him and he agreed , every time the fight went to the ground and i tried to lock/chock/pin or submit him , he just sleeps out from the hold as we were both sweaty .. I tried over and over and over again and each time i manage to apply a lock , he just sleeps away from it in one second until I got exhausted . So what do you guys do against a sweaty opponent ???