Well.... My Girlfriend Stinks!!?

Okay I tried to think of how else to say it without seeming like a you know what. However I said you need to take a shower because you stink. She takes a shower everyday almost and I have even asked her if she wipes her . She says yes then how come I can smell her through her pants when I am laying with her or almost an arms length away from her. You would think if she showers the smell would go away. Now I have that horrible smell in my nose and I just think it has changed the way I look at her. What should I do and how can I have the heart to do anything mean. I have tried to tough it out and I just can't take smells. I feel as though she might not clean between her crack because she might think it is nasty or maybe she has leakage. Whatever the case she doesn't smell it and it goes away immediately after a shower but comes back a few hours later. What should I do honestly?