If your waffle is too moist, it won’t come out crispy. The most common issue is using frozen waffles, which have a little bit of water moisture in them from the freezer and will almost never come out really crispy. Frozen waffles pale in comparison to freshly made ones, anyway, and I’d recommend avoiding them at all costs. Even if you are making the batter fresh, using too much of a moist heavy ingredient like buttermilk or cream in the batter will keep the waffles from being crispy. That’s why you should stick to pre-tested waffle batter recipes until you’re a pretty experienced waffler.