Just thought I'd give a recommendation for a glass cleaning product -
Glaco Glass Compound
For the last few months, I've had a frustrating issue with my windscreen. There appeared to be some sort of residue on it, which i'm guessing might have been a coating applied when it was detailed. It helped the screen repel water, and most of the time appeared to be unnoticeable - but every time I drove into the sun, it became visible as a kind of haze on the screen...and not being totally uniform, it was very noticeable. It was off-putting at worst, but a couple of times, it made seeing through the screen incredibly difficult when driving into sunrise/sunsets. (
@ZN8 - as going to ask if you'd experienced the same also having your car detailed at the same place?)
It looked like when the inside of your screen fogs up, but wiping it with a sleeve had no effect, so it was definitely on the outside. It's appearance didn't change with regular washing. I tried normal good quality glass cleaners and polishes (AG Fast Glass/Stoners Invisible Glass, AG Glass Polish), and I also tried claying the screen twice - nothing would shift it. I actually began to worry that it was something between the layers of the screen.
I then remembered this Glaco stuff...seen a few videos of it. It's actually a series of hydrophobic coating products like RainX, but the one I linked is meant to be used first. It's basically a compound designed to absolutely strip your windscreen of any existing traffic film, residues, fallout or previous coatings. Decided I've give that a try. Washed the car as normal yesterday evening, and went over it with the compound. I've just taken the car out now the sun is falling low in the sky - and hey presto, it's worked! No more haze turning the screen into an opaque mess.
I'm pretty chuffed. Usually I would have thought a clay bar would be the be-all and end-all of stripping coatings off something. But I guess whereas with a clay bar, I had just gone over it lightly with just water as a lubricant, this Glaco stuff is applied like a polish, so presumably it's a cutting compound - plus, it's provided as an applicator designed so you can get really heavy handed and really scrub away at the screen with it.
So I'm most pleased. Of course, the screen has no water repellence any more - the whole point is that you use this stuff to thoroughly clean the screen then apply one of their other products to help the water bead up and roll off. I just wanted something to get the screen cleaned for now so only did the first step,, but I think I'll go ahead and order the complimentary products in the range now.