Perhaps you should try DI. purified water, that'll sort the spotting out.
Bloody hilarious
Was looking for a way to deal with hydrophobic glass at the time..just
bladed in the end.
Rain water harvesting has defo solved any issue though and at this
time I only blade the odd problem window...must admit I am in
the train of thought now of going back to using my DI in the summer
I enjoyed messing around over the last year looking for ways to not
line suppliers pockets but I have found a compromise im happy with.
At least I know if anything goes wrong for example we go through a dry
period or something goes wrong with the Di I can carry on working
regardless until the problem is sorted