Some people absolutely insist that a certain food causes acne for them. In this case, doctors sometimes recommend that they avoid that food, but the bottom line is that if acne is being treated effectively that is all you can do. Changing your diet will not affect your acne. And jumping on someone else's diet routine to clear your acne is most likely a waste of your time and an unnecessary and needlessly effortful lifestyle change. Frequent washing can actually irritate your skin.
Excess irritation can most definitely make acne worse.
A washcloth can aggravate this situation further. Use bare hands to wash and only wash twice a day unless you play some sort of sport which requires the use of a face mask during the day. In that case, a third washing and application of medication may be appropriate. Sweat from exercise itself, however, does not aggravate acne and should not be met with excess washing. Drugs that treat severe stress may have acne as a side effect, but stress itself is no big deal.