Why do I need to add detergent at the bottom of the washing machine?

Placing detergent at the bottom of the washing machine ensures its gets water mixed in straight away and dispersed when the machine begins its action. If it was put on top or scattered throughout then its possible it would take longer to mix properly. Its also likely that the concentrated detergent would lie on the clothing for longer than desired and may weaken the material.

On a side note the fabric softener or other add-ons may be added in a top or central unit to delay mixing into the clothes until the proper cycle washes them into the main washing area.

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