Soap and water???!! What is this the dark ages??lol j/k
I never was told to use s&w...the surgeon said to use a feminine cleansing product because s&w is way too alkaline and will burn and change your ph so you get infections easier...not to mention soap around your urethra will seriously hurt imo!
The drugstores have lots of vag cleansing products. I use Lubrigyn(sp?) for external cleansing. It's creamy and the right ph and is meant to be rinsed off or left on...totes gentle!
For internal cleansing, I recommend buying a proper douche. You can order a small refillable kit from Amazon..some drugstores carry them but not many imo. You can mix your own douche solution by adding some vinegar to water...I can't remember the proportions, but I'm sure girls here would know. Douching is important post-SRS...at least that's how Menard did it...We had to douche after dilating for a few months as I recall...then it was just douche when you feel you need it. Now so many years out, I only douche when I think about it, which is rarely.
As with a natal vag, your tissue and ph will adapt to being vag tissue, and will keep itself balanced for the most part. If you notice anything, you can test it with a kit from the drugstore to see if it's bacteria or yeast, and treat accordingly. Also I highly recommend the probiotic suppositories for vag flora--you have to order them online, most places don't carry them.. But in a pinch you can get RePhresh to balance your ph levels from any drugstore...and they have another kind of flora suppository and supplement. Both are highly recommended.
One word of warning...do not add more vinegar to your douche than the recipe calls for, and do not over-douche....like don't do it every single day once you're a few months post-op. When I first met my current husband, I was douching every day and using too much vinegar--totally wreaked havoc on my vag and put me out of commission for a couple weeks--plus looked totally scary...I was afraid I'd caught an STD!! Turned out to be allergy to the vinegar that I was over-using. At least we got a laugh about it....after we got our std tests haha