Put salt in your washing machine. Here’s why. This is something appliance repairmen will never tell you.

Limescale can accumulate in the heating elements and pipes of your washing machine, reducing its efficiency and lifespan. The abrasive nature of salt helps prevent the formation of limescale by breaking down the minerals that cause it.
Boosting Detergent Efficiency:
Adding salt to your wash can enhance the effectiveness of your detergent. Salt helps to release dirt and grime from fabrics more effectively, allowing the detergent to penetrate deeper into the fibers and clean more thoroughly.
Eliminating Odors:
Washing machines can develop unpleasant odors due to the build-up of detergent residue, fabric softener, and grime. Salt has natural deodorizing properties that can neutralize these odors, leaving your washing machine smelling fresh.
How to Use Salt in Your Washing Machine
Using salt in your washing machine is simple and straightforward. Here’s a step-by-step guide:
Choose the Right Type of Salt:
Opt for coarse sea salt or rock salt rather than table salt. Coarse salts are more effective due to their larger grains and lack of additives.
Add Salt to the Drum:
For a regular-sized load of laundry, add about ½ cup of salt directly into the drum of your washing machine. If you’re dealing with particularly hard water or tough stains, you can increase the amount to 1 cup.
Run a Maintenance Wash:
Periodically, run an empty wash cycle with just salt and hot water. This helps to clean the inside of your washing machine, remove limescale, and eliminate any lingering odors.
Combine with Detergent:
You can add salt along with your regular detergent for each wash. This will boost the cleaning power of the detergent and keep your clothes looking vibrant.
Precautions and Considerations
While adding salt to your washing machine has numerous benefits, it’s important to keep a few considerations in mind:
Frequency:

Don’t overdo it. Using salt in every wash isn’t necessary. A maintenance wash once a month or adding salt to particularly tough loads should suffice.
Compatibility:
Check your washing machine’s manual or consult with the manufacturer to ensure that using salt won’t void your warranty or cause damage to specific parts.
Type of Clothes:
Be cautious when washing delicate fabrics or garments with embellishments, as the abrasive nature of salt could cause damage.