Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to maintain your sofa [title] Vacuum your sofa regularly. [step] If you have a vacuum with an upholstery attachment, this is ideal for vacuuming a sofa. You should vacuum your sofa at least once a week when you're doing your regular chores.

Ending1: Use a section of the upholstery at the bottom to vacuum and sweep. [substeps] Vacuuming once a week can also clear your couch of dust, dirt, and debris. Ending2: This will keep the sofa free of dirt and debris that can cause damage over time. This will also help control air quality in the room where you keep your sofa. Ending3: Consider using a vacuum sponge with a foot brush to suck up dirt and dust, or a soft brush made of nylon or hard rubber. [substeps] Vacuum the cushions only, which means using the brush to avoid stains. Ending4: Check your vacuum's nozzle for dust mites, debris, or microscopic bugs once a week. [substeps] You may get a stool spill on its way out of your vacuum.

Answer format: ending1/ending2/ending3/ending4