Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to clean a dvd [title] Place the dvd label-down on a soft cloth. [step] This can be anything from a tablecloth to a washcloth or a pillow so long as the label is facing down and the blemished side of the dvd is face-up. [title] Gather your tools.

Ending1: [step] For this project, you'll use a clean microfiber cloth as opposed to paper towels or mop pads. These harsh materials can be also rubbed on. Ending2: [step] In order to clean adequately your dvd, you'll need the following items : [substeps] Isopropyl alcohol-used as a cleaner. You can also use toothpaste here, but be wary of most other cleaning supplies as they have additional solvents that may harm your dvd. Ending3: [step] Before proceeding, gather the following materials from the back of the dvd's packaging. [substeps] Removing the disc from the packaging will allow a more thorough cleaning job. Ending4: [step] You will need : [substeps] An isopropyl alcohol wipe (no chlorine) an alcohol pad flashlight. [title] Fill the painting tray with warm water.

Answer format: ending1/ending2/ending3/ending4