These 3 rules will make your SD retreat to the point that you think it's cured forever
I have "experience" with for 30yrs. While I find your post very informing I must add a few things. You should not use the term cure, SD could be improved to the point of not being noticed at all but it will come back if you stop what you did to improve it. The most important thing is to not allow your face to be greasy, this means no creams of any kind. That's why water with salt works, because it cleans the oil while having anti germs action, not because it's a miracle cure. Even if you clean excess oil with hand sanitizer or green tea or water with vinegar/alcool/acetylsalicylic acid, you get the the same results.
So here are my solutions for SD:
1. NEVER allow your skin to be oily, clean it at least 3 times a day.
2. Do not allow the affected area to be in the sun, wear a hat.
3. Do not consume any sugar, if you must sweeten your drink use stevia, also try to stay away from gluten.
These 3 rules will make your SD retreat to the point that you think it's cured forever.... until you break the rules :)