Showering 3 times a day is completely unnecessary and you're wasting tons of water. Seriously, the only two parts of your body that usually smell are your crotch region and your arm pits, and you can use deodorant on both parts. Make sure to wipe with baby wipes too. It's stupid, but no one is watching anyways and it gets you much cleaner.
Also, the most important thing is to make the girl feel awkward and out of place. Make her feel even more awkward than you do talking to her. Then, sort of just laugh at her awkwardness. It will get you tons of action.