Could you not buy some water to tide you over, Daz?
ill risk it mate for a few days.just got 4 weekly maintenance cleans to do.dark nights and lots of wind and rain at the moment so i dont think itll be a problem really.
im using the 41 tds water tomorrow.sod emptying the tank!ill check my work as i go.im using hot water so i dont know whether that will reduce the chance of spotting.ill blade ground floors just to be on the safe side though.
my water today must of been 35+ without me knowing and i had no spotting problems with the windows i checked after they d dried.
tomorrow and sat i will just fill the tank with water straight out of my tap.i certainly wont be blading upper windows though!!