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The kitchen drain can sometimes become smelly through regular use because food residue, although it is supposed to rinse down the drain, can become trapped in it. Food stuck in the drain can begin to rot and grow bacteria or mold, which can give off a strong and unpleasant odor. Since you prepare meals in the kitchen and family members are always using the kitchen, you want to make the drain smell better; since it is near a food preparation area, resolve the problem without the use of harmful chemicals.
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Pour 1/2 cup baking soda down your drain--soda is a deodorizing agent.
Pour 1/2 cup white vinegar into your kitchen drain--it will foam up as it encounters baking soda. Let the foam sit in the drain for 15 minutes.
Pour 1 quart boiling water down the drain.
Repeat Steps 1-3 weekly or as needed when you notice an unpleasant odor developing in your kitchen drain.
As soon as vinegar meets baking soda, it reacts and creates foam. Vinegar is a disinfectant and deodorizer, so as this foam works down through the drain, it cleans off your pipe walls.
Use a plunger to loosen any blockage that may be causing the odor. Plunge for about 10 seconds and flush 1 quart boiling water down the drain to rinse away loosened buildup.