Tap the lid edge firmly on a countertop
Run the lid under hot water for 30 to 60 seconds
Use a rubber grip pad or dish towel for better traction
Strike the lid side gently with the back of a spoon
Pry the lid edge slightly with a spoon handle
Wear rubber gloves for extra grip
Ask someone else to hold the jar while you twist the lid
Use a jar opener tool
Loosen the vacuum seal by inserting a butter knife under the lid edge carefully
Twist the lid counterclockwise while holding the jar steady