A washing machine is an essential household appliance that we rely on to keep our clothes clean and fresh. However, if you notice a foul odour coming from your washing machine, it can be both unpleasant and concerning. Here's why your washing machine smells bad and how to fix it.

1. Mould and mildew buildup Mold and mildew can grow in your washing machine over time, especially in the warm and moist environment of the drum. That can cause a musty or sour smell. To fix it, clean the drum, detergent dispenser, and rubber gasket with hot water, vinegar, and baking soda. You can also run a hot cycle with a cup of bleach to kill any remaining mould or mildew.
2. Clogged drain or filter If the drain or filter in your washing machine is clogged, it can cause water to back up and create a foul odour. To fix it, check the drain and filter for any clogs or debris and remove them. You can also run a cycle with a washing machine cleaner to clear any buildup.
3. Improper use of detergent Using too much or too little can cause a buildup of soap scum and bacteria in your washing machine, leading to a bad smell. To fix it, use your machine's recommended amount of detergent and the load size. You can also cycle with a washing machine cleaner to remove any excess buildup.
4. Overloaded machine Overloading your washing machine can cause water to sit in the drum, leading to a bad smell. To fix it, only load the machine with the recommended clothes and run a cycle with a washing machine cleaner to remove any remaining odours.
5. Broken drain or vent hose A damaged drain or vent hose in your washing machine can cause water to back up and create a foul odour. To fix it, inspect the hoses for any cracks or damage and replace them if necessary.

In conclusion, a bad smell coming from your washing machine can be caused by various factors, including mould and mildew buildup, clogged drain or filter, improper use of detergent, overloading the machine, and broken drain or vent hose. To fix it, clean your washing machine regularly, use the recommended amount of detergent, avoid overloading the machine, and check for any damage to the hoses. If the problem persists, it may be time to call a professional for help.