In large mixing bowl, crack the eggs and mix on high for 1 minute.
Turn down to low and slowly add milk, seltzer water, syrup and sugar.
Turn off mixer and add baking powder, baking soda and flour then turn on low and mix for 1 minute. Scrap sides of bowl and mix for another 30 seconds.
Using ladle,(or 1/2- 2/3 cup measurement), pour onto preheated waffle iron surface and cook for approximately 4 minutes. Waffle should be golden brown. Carefully remove from iron and place on warmed plate and cover with warm towel if not eating right away.
Spread on butter just prior to drizzling with syrup.
For EXTRA crispy waffles, cook for an additional minute until waffle is medium to dark brown, BUT NOT burnt.