Benzyl benzoate! Apply right after a shower, then a 2nd time in the day. 2nd time, either shower or lightly rinse with soap the area for 10 sec, then rinse off. Try to keep lint and paper towel dust off (hard to do). Then apply the BB.
Went to my doc over this, she said take very short showers, try and avoid long hot showers. Skin oil is how the bacteria get under the skin. Vitamin B5 also helps as suggested previously. I've heard tea tree oil works too (with less sides than BB, I've heard).
Don't take too many fish oil pills. The EPA builds up over a few weeks and harms b and t immune cells. Also, if none of this works, try intermittent fasting. It has immune system benefitting effects.