Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to use hydrogen peroxide in the garden [title] Clean pots and tools. [step] Spray or wipe a 6%-9% peroxide solution on to pots or tools you are reusing. You can also dip tools into the solution while you're pruning plants.

Ending1: [title] Scrub pots or tools with salt and baking soda. [step] Scrub pots and tools with a salt and baking soda solution. Ending2: This can disinfect these items and reduce the risk of contamination from other plants or pathogens. [substeps] Look for pharmaceutical or food-grade peroxide. Ending3: Don't use toothpicks and nail heads, as these could cause damage to soil. [title] Soak a garden leaf or stem with hydrogen peroxide. Ending4: [substeps] Vinegar can be substituted for hydrogen peroxide at home. Apple cider vinegar works well, but try using white vinegar instead if you have an apple orchard.

Answer format: ending1/ending2/ending3/ending4