Drinking more water, taking electrolytes supplements and extra potassium and magnesium were not fixing my dehydration. I think what was missing was increasing my salt intake. Fortunately I do not have high blood pressure issues so I just started adding a little more salt to my food as well as a dash of it into my electrolytes beverage. Result seems promising. No dizzy spells today when I stand up so maybe a little extra salt is the easy fix. I will add pretzel sticks, the kind with salt crystals on them, to my shopping list. They are not snacks I normally buy but I like them OK now and again.