There....
....are many factors that will influence how much you will use such as:
- capacity of the machine
- how full it is
- how hard the water is
- how dirty the laundry is
Choice, our consumer magazine, ran a one-off test earlier this year when testing powder detergents. Using their standard test method (Machine filled to stated capacity, 'cold' - 20c wash, normal/cotton cycle) they retested the top performing front load detergent, OMO for Front Loaders which is part of the Lever (Persil...) family, at reduced doses to see how it would clean.
- At full dose it scored 86%
- At half dose, it was still strong on grass/tomato...though no score is available but I remember reading at the time it was still the top performer.
- At quarter dose, it scored 80% which put it in third place (second scored 81%...4th 79%)
Their comment below is very valid and would go someway to improving the rinsing many complain about:
'Comparing our data over the past two decades, the amount of water used by front-loaders has halved, and while the recommended detergent dose has also reduced, perhaps it hasn’t reduced enough for today’s exceptionally water-efficient washing machines. This could be partially to blame for detergent residue on clothes.
While we tested only one detergent at one-quarter dose, you may find similar results with your favourite detergent'
Personally, I very rarely dose at 100% with high end detergents and generally use 1/2 the recommended amount. I have never had an issue with either performance of product or appliance...
As someone who has never had a 'washing machine smell' (and I DON'T use bleach), I will give you this suggestion....
USE POWDER only
and
use 1/3 the quantity of fabric conditioner watered down (if you must use it)
Scrud (grey waxy buildup...smelly and often mouldy) is actually mentioned in Fisher and Paykels manuals here...it is caused by cool/cold water washing, liquid detergents and fabric conditioners...remove the first and reduce the last and you should never have an issue....