[Smurf]

I would say the reason is phobic glass naturally forms larger water droplets and alot more of them too so is more likely to spot regardless if there is any dirt in the water droplets or not if using a higher ppm.

The higher the ppm water left on the glass the higher the chances of spotting.

Well that's my opinion anyway and I'm sticking to it.

[NWH]

Do you think all your customers check there windows with a magnifying glass I think you'll find on a lot of houses you do there are marks and a few spots in direct sunlight,there's a lot of people out there that will let it go unless they look like your taking the pee. The odd spot in sun is far better than a window that has been cleaned with a dodgy blade with turn marks galore that's for certain.

[dazmond]

i switch to double DI when my resin creeps up to 005.i dont see the point in risking leaving spotting on the glass.

[Dave Willis]

   why don't you use double di all the time?

[dazmond]

  why don't you use double di all the time?

why would you dave?you dont need 2 vessels all the time.only when the single resin vessel tds creeps up then you put a fresh one in front of it to get the most out of the older one.then when the older one reaches your tap tds then bin it and go back to a single vessel until that starts to creep up and the cycle continues.

[gary999]

I have recently cleaned using water with a tds of 79 due to my membrane being knackered! I have received no complaints, in fact last year I connected the drain water to the tank accidently and used water with a tds of 300! I did however receive a complaint on this day!! But the 8 other customers I did that day did not seem to notice and paid as usual!! I'm beginning to think that having a tds of 0 is unesasary, in fact I may stop using resin as long as I can get the water down to 20 with the RO.

not all complain some think o that clean was poor but we will c how the next clean is if its bad again we will cancle an make a excuse  008 at the most ide say an thats pushing it

That's what some on here seem to forget, just because a customer doesn't complain doesn't mean they are happy
with the service.
Totally agree most fair minded people will give you another chance and some wont even notice a one off poor quality clean.

Ive been cleaning with water over 30ppm for a year, I have to blade off a small percentage of glass
normally hydrophobic but  im constantly picking up new work and lose very little....not bad for someone
who only offers a poor quality clean

[gary999]

Also agree that you can clean with water above zero.

Never understood this thinking.
The basicS of getting the glass clean is to use pure water with oo TDS,  so why would you want to use higher and risk doing a rubbish job ?

That's because you have been brainwashed into  that thinking by suppliers, do you really think there is
a dramatic difference between using 10 parts per million opposed to zero

Plenty of cleaners local to myself use 00ppm and do an appalling job, I personally think if you use
the correct technique for the situation you should be able to use 10-15ppm with no issues at all on
most glass and if you are talented like myself higher

[Smurf]

Also agree that you can clean with water above zero.

Never understood this thinking.
The basicS of getting the glass clean is to use pure water with oo TDS,  so why would you want to use higher and risk doing a rubbish job ?

That's because you have been brainwashed into  that thinking by suppliers, do you really think there is
a dramatic difference between using 10 parts per million opposed to zero

Plenty of cleaners local to myself use 00ppm and do an appalling job, I personally think if you use
the correct technique for the situation you should be able to use 10-15ppm with no issues at all on
most glass and if you are talented like myself higher

I must be brainwashed then 

[Dave Willis]

  why don't you use double di all the time?

why would you dave?you dont need 2 vessels all the time.only when the single resin vessel tds creeps up then you put a fresh one in front of it to get the most out of the older one.then when the older one reaches your tap tds then bin it and go back to a single vessel until that starts to creep up and the cycle continues.

Because your fresh resin would last longer with a knackered bottle before it (provided it was lower than the water going in to it) thus you are only benefiting from a double DI for half the time instead of all the time the way you're doing it now.
Your fresh bottle is being hit with 55tds water or whatever your supply is when it could be hit with 005 from a spent bottle instead.

[dazmond]

  why don't you use double di all the time?

why would you dave?you dont need 2 vessels all the time.only when the single resin vessel tds creeps up then you put a fresh one in front of it to get the most out of the older one.then when the older one reaches your tap tds then bin it and go back to a single vessel until that starts to creep up and the cycle continues.

Because your fresh resin would last longer with a knackered bottle before it (provided it was lower than the water going in to it) thus you are only benefiting from a double DI for half the time instead of all the time the way you're doing it now.
Your fresh bottle is being hit with 55tds water or whatever your supply is when it could be hit with 005 from a spent bottle instead.

you really havent a clue have you dave?RE READ MY POST CAREFULLY AND HOPEFULLY ITLL SINK IN MATE!

[swanson]

My tap water is 60 TDS

[Gerald Ash]

This is my opinion.
I clean with water upto 10TDS.
I have no problems and every customer is told look after they are dry, any problems let me know and free clean next time.
  As I understand it in theory water under 50 will not be visable but of course either side of 50 will spot/not spot.
 I figure it this way, if I use 000 on the glass, agitate the dirt then rinse the water left on the window is unlikely to be 000.
So if I use water 010 the water left on the glass will be a little higher. More chance of spotting.
 If you rinse to ensure 000 left on window it takes longer. The water is 000 per million so is not totally pure if you measure per billion or trillion.
I double rinse every window but still get spotting every now and then usually because of a vent or forgetting the top of the frame.
Just my opinion.


   

[Soupy]

Chunky chunky chunky (gary999). Please stop offering "advice" - you're giving the whole industry a bad name.

Use 000 - nothing else.

[Smudger]

Sorry Daz, I think your using the bottles the wrong way round....

Gary, what would be interesting to know is if 30 tds of naturally soft water cleans differently to 30 tds of ro filtered hard water,  as tds is more an indication of conductivity and can be a variety of elements, perhaps different parts of the country could clean with a higher tds reading as it lacked salts which would spot and a higher amount of minerals that possibly do not spot as bad ?

Darran

[Dave Willis]

That's the conclusion I came to, but I think Dazmond is mixed up between the words "in front"
Even so, I still can't see why he doesn't use a double DI system all the time instead of sometimes 

I always have a bottle of semi spent resin before my 000 bottle of resin.

[samson]

That's the conclusion I came to, but I think Dazmond is mixed up between the words before and after.
Even so, I still can't see why he doesn't use a double DI system all the time instead of sometimes 

I always have a bottle of semi spent resin before my 000 bottle of resin.

We do the same, as it makes financial sense to have your old resin acting as a pre-filter before the new DI.

[Dave Willis]

I'm not entirely sure what 'dissolved solids' are for a given area. In my region the water is laced with calcium as it's very hard water with limestone rock everywhere. I don't know what the dissolved solids would be say in Scotland?

[Soupy]

Special brew?

[samson]

 

Special brew?

[samson]

Many moons ago I used to drink that stuff, made me do some really weird stuff