Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to thoroughly clean your computer [title] Remove dust from the interior. [substeps] Turn off the computer and unplug the power cord. Open the computer tower according to the manufacturer's suggestions.

Ending1: Remove the dust with a rag or paper towel before you store any valuable data. Afterwards, the machine may finally be clean. Ending2: This might involve removing screws or pressing a locked-button mechanism. Use tweezers to remove large clumps of dust or debris. Ending3: Check the wiring or circuit board for missing parts and cables. Look at the back of your computer for replacement parts. Ending4: Lightly remove excess dust with a soft cloth or baby wipe. [title] Run warm water on a small sink or bucket.

Answer format: ending1/ending2/ending3/ending4