Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to apply graphic skins to laptop and other devices [title] For best results : [step] Apply indoors with a dust free environment. [title] Tools required : [step] Masking tape, new razor blade or scissors, squeegee (credit card), soft cloth, tape measure. [title] Make sure your notebook is clean.

Ending1: [step] Wipe it off with a soft cloth. The notebook should be free of dust, oil and grease-otherwise the skin may not stick to your laptop as well as it's supposed to. Ending2: [step] This will ensure that you have the proper sized notebook. Stainless steel is best for this type of work. Ending3: [step] If it is dirty it could cause issues with editing and it might also cause wear and tear on your artwork. It's best to clean a notebook before going to the store to buy new stickers. Ending4: [step] Wash it in cold water to remove ink and debris. Make sure all any smudges are gone.

Answer format: ending1/ending2/ending3/ending4