We stopped using rainX once PIAA released their own version, much better, £5.99 bottle
Mine beads with just using the wipers themeselves (i.e. the silicone seems to leave behind some which causes the water to bead when the wipers arent in use, very apparent with Amanda's and my car). Will this stuff do much extra? If it does, stick a bottle in my order
Thats the way the wiper system works, if you run the wipers dry on the screen every two weeks it will top up the coating, the soluion gives that extra coating which is usefull this time of year, if the wipers are doing their job then not needed.
The screen wash addetive leaves an additional coatng eveytime you use the washers as well as shifting the crud off the screen.