A number of ladies, myself included, take FemDophilus capsules. You can get these in a health food store. (They need to stay refrigerated.) You take them orally for a number of weeks and the probiotic organisms will get there. Some ladies douche with active culture yogurt. Both of these will help establish a microflora conducive to better odor/health.
And yeah, I have that vaguely fishy odor. As long as the lube is clear it should be OK.
But as with all things, check with your surgeon about your concerns, ask for advice, and ask if it's OK to initiate anything on your own.