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How to air fry bacon 
Preheat the air fryer before adding the bacon. 
Your air fryer requires a two to three minute preheating period. This allows the machine time to achieve the temperature necessary to begin cooking your bacon.
For most models, simply set the air fryer to the desired temperature and wait at least two minutes before adding your bacon to the air fryer's cooking basket. Operate your air fryer only on level, heat-resistant surfaces.