Yes, it is generally true that using hot water in the washing machine can clean clothes more effectively compared to using cold or normal water. The effectiveness of hot water in cleaning clothes is due to several factors:
Enhanced Chemical Reactions: Hot water increases the activity of detergents and other cleaning agents. Detergents work better in higher temperatures because the heat energizes the molecules, allowing them to react more efficiently with stains, dirt, and oils on the clothes. This increased chemical activity helps to break down and dissolve stains and soils more effectively.
Better Stain Removal: Some types of stains, especially those from oily or greasy substances, respond better to higher temperatures. Heat can help to melt and loosen these substances from fabric fibers, making them easier to remove during the washing process.
Improved Soil Removal: Hot water can help to open up fabric fibers, allowing dirt and debris to be released more effectively. It also enhances the flushing action of the washing machine, helping to carry away loosened particles more efficiently.
Sanitization: Hot water can help kill certain bacteria, germs, and allergens present in clothes. This is especially useful for items like towels, bedding, and undergarments that require thorough cleaning and sanitization.
However, it's essential to note that not all fabrics and garments can tolerate hot water. Some fabrics, like delicate items or clothing made of natural fibers such as silk or wool, can shrink, fade, or become damaged when exposed to high temperatures. Always check the care labels on your clothes to ensure you are using the appropriate water temperature for each item.
To strike a balance between effective cleaning and garment care, consider using warm water (around 40-60°C or 100-140°F) for most regular loads. For heavily soiled items or linens, you can use hot water but be cautious about doing so with delicate or sensitive fabrics. If in doubt, it's best to use the water temperature recommended by the clothing manufacturer or opt for cold water, which is generally safe for most fabrics and still provides adequate cleaning in most cases, though it might not be as effective for some tough stains.