I’m not sure what you mean.  She’s usually clean in general.  But I can recommend products for bathroom use if you want to talk about it further?
assistant
She needs to shower more often, and that probably means she needs to bathe more often, too.  Have you ever considered encouraging her to do so?  A strong suggestion from you might work, or even a gentle coaxing.  If she’s not doing so for her own reasons, then it may help to bring the issue up with her directly.
assistant
Why does my girlfriend always stink up the bathroom?
user