Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to ground yourself to avoid destroying a computer with electrostatic discharge [title] Work on a hard surface. [step] Assemble or take apart computers on a clean, hard surface to minimize static buildup. A table, countertop, or a plank of wood will work fine.

Ending1: [title] Stand on a hard floor in bare feet. [step] Carpets and socks can give you a charge. Ending2: [title] Wrap smoke screens with nicotine-absorbing dust paper. [step] This will reduce static as well as the excessive number of dust particles that build up when the smoke is slowly dissipated away. Ending3: [substeps] If you have a little legroom, sanding your desk will be a good idea as well. Protect the table or your workstation by painting a matte finish over them. Ending4: [substeps] Additionally, make sure the computer you're working on is totally dry. At the very least, it shouldn't be dripping wet.

Answer format: ending1/ending2/ending3/ending4