Please choose the correct ending to complete the given sentence: Health: [header] How to fix vape pen wires [title] Unscrew the vape pen heating chamber. [step] The top part of the pen is the mouthpiece, or tank. Twist it counterclockwise to remove it.

Ending1: [title] Unscrew the pen points by twisting them counterclockwise and then unscrewing them. [title] Put water in the pen tank until the pen is completely filled, depending on your model. Ending2: Use a plumber's wrench to loosen the tank lid over the pen. [title] Use 2 teaspoons rubbing alcohol and a bullet-head screwdriver to remove the top part of the pen. Ending3: Next, you will see the heating chamber with the coil inside of it. Pull it off the same way, leaving the wire coil in place. Ending4: After it's removed, twist it clockwise to release the screw that holds the pen tube in place. [title] Place the pen tube into a polyurethane glass case.

Answer format: ending1/ending2/ending3/ending4