UK Powders
What an interesting thread!
I am delighted that the OP is impressed with UK Persil Bio powder. This thread inspired me to do some testing of UK powders - performance and rinsing.
I have just returned from holiday with 9 loads of laundry to do. I have been working my way through these loads today with Ariel Bio, Persil Bio, Persil Non Bio and Daz Bio. Not a drop of fabric conditioner has been used, so that I can just focus on comparing the powders. All washes were done on `Easy Care 40' in the Bosch front loader and for each wash I used 120ml. We have hard water.
Performance wise, I noticed no difference between any of the products and many of the loads were quite soiled. I have three young sons. Even Persil non bio dealt with dried in vomit, urine, chocolate ice cream and sweaty shin pads no problem.
Rinsing wise, Ariel has indeed been reformulated and rinsed clear by the second rinse. I hadn't noticed this and could barely believe my eyes. Daz says `new formula' on the box and the product appears the exact same as Ariel with the blue streaks in it. However, the rinsing was a very different performance to Ariel - the Daz whipped up suds on every rinse so clearly there is some old technology going on despite the revised formula. Persil Bio rinsed really well, and non bio slightly less well, though still acceptably.
All loads were tumble dried without fabric softener.
Scent wise, on dried laundry, I preferred both Persils over Daz and Ariel. This surprised me a little as I actually thought I would slightly prefer the Ariel! I do in the box, and as it wafts from the washer.
To my nose there is now very little difference between Persil bio and non bio, the bio is simply a very little more zesty and hard core. Both left a really fresh scent on the laundry, whereas there was something peculiar, clashing and cloying about the Ariel. Daz left an OK scent which in some ways was very pleasant, but in other ways smelled a little cheap and reminded me of insect repellant spray. Because it was the only one which rinsed poorly, I would discount this product anyway.
Today kind of settled it for me that with current formulations I slightly prefer Persil Powder over Ariel though they are both great performers and it's down to personal preference.
With regards LIDL Formil - I also have a lot of time for this detergent. Unfortunately I have found that it does not clean as well when pitted against the likes of the above brands, contains more fillers and doesn't start working so well from cold. (I tested about a year ago and the results were fairly conclusive)
Just for info - as an aside - a couple of weeks ago I tried Surf (Tropical and Lavendar variants) and was very disappointed with it, finding it to perform worse on a range of stains than Persil Non Bio and for it not to deoderise properly despite containing oxygen bleach. It did have great rinsing and barely sudsed - which was great, but the disadvantages were too significant to consider it.
Thanks to everyone for contributing to a very interesting thread, and for inspiring me to have an interesting (if geeky) day!
Nick