Can cold water be used for washing

The washing machine on Waiouru has a cold wash cycle which Jan intends to use.  She always did the washing with cold water back in Australia and New Zealand and modern laundry powder can be used for cold washing.  Actually, germs breed better in hot water (unless it’s boiling)! 
The following is another example of cold water washing sent to me by my FMiL.
Can Cold Water Clean  Dishes?
This is for all the  germ conscious folks that worry about using cold water to clean.
John went to visit his 90 year old grandfather in a very secluded, rural area of Saskatchewan  .
After spending a  great evening chatting the night away, the next morning John's grandfather prepared breakfast of bacon, eggs and toast.
However, John noticed a film like substance on his plate, and questioned his grandfather asking,
'Are these plates clean?'
His grandfather replied,
'They're as clean as cold water can get em.
Just you go ahead and finish your meal, Sonny!'
For lunch the old man made hamburgers.
Again, John was concerned about the plates,
as his appeared to have tiny specks around
the edge that looked like dried egg and asked,
'Are you sure these plates are clean?'
Without looking up the old man said,
'I told you before, Sonny, those dishes are as clean as cold  water can get them. Now don't you fret, I don't want to hear another word about it!'
Later that afternoon, John was on his way to a nearby town and as he was leaving, his grandfather's dog started to growl, and wouldn't let him pass.
John yelled and said, 'Grandfather, your dog won't let me get to my car'.
Without diverting his attention from the football game he was watching on TV, the old man shouted!
'Coldwater, go lay down now, yah hear me!'
On a more serious note.  More sanding and cleaning down the paintwork today.  Jan and I now have a routine so it’s getting quicker….. But not any easier! (no photos as not much has changed).  Darren is not working tomorrow but will be back on Sunday.  The plan is for him to give the roof a second coat of gloss and a first coat of gloss onto the coachlines.  The 12v sockets for the concealed wiring (freezer, satdome, and NMT) arrived today.  The Engel freezer is now connected to the Empirbus 12v system which has removed another temporary 240v cable from within Waiouru. The remaining sockets will be fitted tomorrow.  Richard and now made all the internal doors and fitted the hardware (hinges, handles, etc).  I assume he will hang them on Monday.
During our weekly Friday meeting Andy informed me he plans to crane Waiouru into the water on 11 September.  The fit-out will not be completed until later in the month but this now gives us a timeframe in which to arrange for the surveyor to complete the necessary work to obtain the RCD and get Waiouru licensed.