I am having to calibrate system several times during the day as it keeps DE.
That happens regardless this time of year. Its because the hoses shrink due to low temps creating additional resistance to water flow; probably bugger all to do with Vision.
Ours arrived today. Id say first off that having dosed it in the tank in the van that it wasnt an adequate amount. Having added it at 1ml/100 litres of pure and driving 5 miles before the first house I found that it created bubbles on the glass but I didnt feel that there was anything more on this occassion that it did, nothing particularly beneficial. We did a number of houses, some with phobic glass and some with phillic glass but I didnt notice anything particularly beneficial. I was giving it some thought though and as we rinse on full bore at about 3 litres a minute it would have to be running off the glass at a really high rate for it to improve this.
Im not sure if the bubbles on the glass is caused by a detergent/soap in the concentrate or are they just air bubbles. If this stuff works by breaking down the surface tension of water then they could quite easily be air bubbles and if so is that necessarily a good thing? I'll expand on that in a minute.
Anyway, i also tested the waters TDS after adding this stuff and it hadnt affected it at all.
I had told Darren, my equivalent of DTM, that something had been added to the water but not why and to see if he noticed a difference. Anyway, first thing he spotted were the bubbles on the glass, his comments were that it seemed to clean easier but he couldnt expand on that when I pushed him, probably not too concerned about it. At that stage I hadnt noticed anything regarding extra cleaning.
After lunch I added 1ml more, into what was about 200 litres of water left in the tank and there was a noticeable difference in the amount the brush slipped across the glass. Maybe we need a small amount more of the stuff to create a similiar effect, although I cant see how that is as R.O. - D.I. water is the same the country over.
Going back to one point I touched on; if the brush slips across the glass easier is that necessarily a good thing? Surely this could mean that the glass isnt cleaned adequately as there is insufficient cleaning done or you have to have more passes of the brush to create the same amount of friction and rub on the glass as you might otherwise.
Anyway, so far as Im concerned, the jury is still out.
I'll be using the rest of the bottle and hopefully by then will be able to make a more considered judgement. Im hoping to get some snail trails to deal with and see what happens with them, unfortunately didnt see any today.
Matt