Why you should always use liquid detergent - CNET- nirma washing powder soap powder washing powders with wash ,Powder can also leave chunks of undissolved detergent in your washing machine parts. As you can imagine, this can lead to malfunctions. It particularly affects the washer's drainage system.Almost extinct in the US, powdered laundry detergents ...These are the two ends of the global laundry detergent market. Consumers in the US, accustomed to liquids or newer unit-dose pod products, may not be aware that powders are alive and well in ...