Solid waste build-ups can cause a musty smell in your area. The pipe is probably harboring a layer of gunk in your dishwasher sink, shower drain, and that might also be coming from the overflow pipe that has cracks and leaks. Though you might think you can't access this pipe as quickly as you can access the drain itself, it is possible to wash it. There are many household items that you can use like vinegar, baking soda, or oxygen bleach as a less-toxic alternative to commercial bleach.

Here are the procedures of DIY for eliminating foul odor in your sink:

To make a natural scouring mixture first, combine 1/2 cup of baking soda and 1/4 cup of table salt. Pour it directly down the sink.

Secondly, slowly pour 1 cup of warm distilled white vinegar down the sink. Let it sit there for an hour. Notice the mixture as it foams. Observe as the combination emerges through the overflow pipe; this process will depend on the force of the foaming action in the drain. If the process doesn't work, you are more likely to need the oxygen bleach later. But just a reminder, that these mixtures are on a high level of acid which can cause cracks and deterioration of the valve or sink. To help you with a more detailed and safe solution, ask the experts in plumbing like the plumber in Scottsdale, AZ.

To proceed to the next step: flush the drain with hot water in about 30 seconds. Let it fill with a turkey baster with warm water and squirt the water into the overflow pipe to rinse that segment of the drain system.

We need to check whether the overflow pipe still creates a foul odor. If so, the foaming did not reach far enough up the tube to reach the problem. Try to open the window for ventilation. This time, fill the turkey baster with oxygen bleach.

Make sure to insert the tip of the turkey baster into the overflow pipe. Squirt the oxygen bleach into the tube as might as you can. Follow the process it a couple of times or more to cover as much of the inside of the pipe as possible. Let sit the oxygen bleach for half an hour.

Thoroughly rinse the pipe by squirting in hot water with the turkey baster. Dip a cloth in distilled white vinegar and wipe the inside of the overflow pipe. This procedure will kill any bacteria living in the mouth of the opening. Lastly, set the vinegar to evaporate.

Things You Need for this Procedure:

• 1/2 cup baking soda

• 1/4 cup table salt

• 1 cup warm distilled white vinegar

• Turkey baster

• Oxygen bleach

• Cloth

Tip:

Be extra careful upon doing these procedures and wear protective gear while you use it. Anyways, Oxygen bleach is less toxic than regular household bleach. But if it's too risky, do reach out to the experts.