On 11/03/2019 08:38, harry wrote:
On Sunday, 10 March 2019 08:35:51 UTC, Andrew Gabriel wrote:
On 10/03/2019 08:13, harry wrote:
On Saturday, 9 March 2019 16:42:21 UTC, Scott wrote:
If I use pre-wash on a 60 degree wash programme, what temperature is
the pre-wash likely to be? My understanding is that the pre-wash
should be at a lower temperature using biological detergent with lots
of pauses before moving on to the main wash, where biological
detergent should not be needed due to the temperature.

On most machines, just cold water.
Ideal for removing caked on mud (eg football jerseys)

Yes, should be cold, which will also help remove some types of organic
soiling which can be cooked on before they get cleaned, such as some
proteins (although modern washing machines are all profiled temperature
washes, starting off below 35C to achieve this even on high temperature
washes).

--
Andrew

It is the reason why all new machines are cold fill.
In days of yore, most machines filled with both hot and cold water.


The reason is that its cheaper and they don't use anything like as much
hot water.

Hot and Cold fill washing machines had bio cycles which kept the temp
down anyway.