Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to get pen off your skin [title] Wet a cotton ball or washcloth with isopropyl alcohol (rubbing alcohol or surgical spirit) and scrub the ink off your skin. [step] Rubbing alcohol is often your best bet for removing the oil-based ink found in most pens. It dissolves oils, allowing you to wipe the ink off your skin.

Ending1: [substeps] Wring out the cotton balls before you begin scrubbing. As such, wring out the strips continuously as you rub them. Ending2: [title] Wait 10 to 20 minutes before rinsing with warm water. [step] This might be the hardest thing to do, as your skin will be sensitive once you remove the ink, but 10 to 20 minutes should be plenty of time to get the ink completely out. Ending3: Many other cleaning agents use alcohol as the main solvent, so using it straight should give you the best results. [substeps] Try not to use the rubbing alcohol in a small, confined space, as the smell is very strong. Ending4: However, the rubbing alcohol won't work for most ink stain-removal products. Wipe away as much ink as possible with a cotton ball or washcloth.

Answer format: ending1/ending2/ending3/ending4