Mix the sugar (if using) with the paprika and gently rub it onto the bacon slices.
Place a small amount of water on the bottom of the air fryer and arrange the bacon slices in the air fryer in a single layer. It depends on the size of your air fryer, if needed but them in half or cooks in batches.
Cook 8-10 minutes or until crisp.
Remove the bacon and place it on a paper towel-lined plate.
Clean the bottom of the air fryer with a paper towel, and repeat with the remaining slices.
Keep in mind that thinner bacon slices may cook quicker and thicker ones may need a few minutes extra.
If needed, reheat the bacon slices for 1 minute in the air fryer and serve.