Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean carpet without a carpet cleaner [title] Address stains immediately. [step] Do not let stains sit on the carpet for a long period of time. Clean up stains right away so the stain doesn't absorb into the carpet fibers.

Ending1: Try to take a spill right away to blot up the stain. Some marks you might wish to address right away are : [substeps] Black stains--they tend to appear on white carpet. Ending2: Stains that sit on the carpet can also end up leaking into the bottom of the carpet, causing mildew and odor. [substeps] If you know people are going to eat or drink around the carpet, have cleaning materials on hand in the event of spills and stains. Ending3: Erase residue as soon as possible to make sure your cleaning method is effective. [substeps] If stain and odor aren't getting to the carpet quickly, you may want to pick up steam from your exhaust fan or an air conditioning unit to neutralize it. Ending4: Top the stains with a stain remover. When stain removers aren't working, redo steps 16 and 17.

Answer format: ending1/ending2/ending3/ending4