Geez the guy has a serious question, so here is a serious answer: After showering or bathing, pad dry your balls and let air dry (moisture is the leading cause of odor). Once you balls are not sticking to your thighs anymore, use deodorants like the Axe (which works and does not burn) or baby powder. Because you propobly keep your balls inside your pants for most of the day, Moisture tends to build up, now you have 2 choices; if at work or in a public place, go to the restroom pull your pants down and pad dry with toilet paper or if at home take another shower and repeat.
I use this method and all the ladies love the way my balls smell, which is good because they suck on them when I'm getting a (blowjob)
Lot of luck with you smelly balls (2thumbs)