Nice to see those towels getting a good ole skool wash Rob! Beware the probe testing - if you have an addictive personality like me, you'll end up testing all different cycles and hours of your life will whizz by......
Liamy1 / Hooverpulse - I have found that Persil bio powder no longer rinses any cleaner than Ariel. This is since the Unilever formulation was recently compacted, in line with P/G resizing. So you are no longer missing cleaner rinsing with Persil (in my experience) and may as well stick with Ariel, which in terms of bio powders also happens to be my detergent of choice. Furthermore, the tables seem to have turned and Persil is now the stronger scented of the two, to the extent that you can still smell it on DIRTY linen waiting for the wash which is a real turn off to me. It's all personal choice, but current formulation Persil powder isn't for me. Current Daz isn't a bad powder either, doesn't leave too much stink and is a great detergent for the price, especially if you look out for the offers. I've found it performs very similarly to Ariel on general laundry, it is said less good on certain stains, but to my nose laundry isn't quite as fresh with Daz either.
Woah, look at me going off topic. Still, you started it Liamy1 and it's your thread after all.....
Now, back to those temperatures.....