I have a scent fetish, I would know what works, here's my advice:
1) Ph Balance Soap
Clean daily, outer not inner vagina. Dab coconut oil/aloe vera around lips afterwards. Epsom salt with lavender oil soaks are amazing. Do a deep vanilla and cinnamon oatmeal bath soak. Dab a little bit of honey or agave on your pussy lips (a little bit, not a lot, and only right before sex).
Change your underwear everyday. Use panty liners during the day (change those out through out the day). Wear cotton material underwear to help your pussy get fresh air (try to avoid wearing underwear as much as possible). Definitely don't sleep with any underwear on at night.
3) Avoid These Foods/Drinks
Coffee, garlic/onions, broccoli, heavy protein diet, bread/yeast, heavily salted foods and alcohol. (safe foods: natural fats, veggies, nuts, fruits, oatmeal, chia seeds, honey, yogurt and foods with omega3, apple cider vinegar is safe).
Prenatal vitamins. Pueraria Mirifica. Synsepalum dulcificum (you and partner eat this 30 min before sex).
5) Partners Oral Health
Make sure your partner brushes their teeth before and after. Rub some coconut oil on your partners chin and lips. Taking care of their mouth, will help take care of your coochie to keep it balanced and clean- so it stays smelling great. Like, brush their teeth for them if they let you- because then you'll make sure it's as good as it will get.