Clear Vision in the Summer Heat: Windscreen Prep and Water Repellents

Most people just spray a repellent on dirty glass and wonder why it fails in a week. To get it right, you've gotta strip the old road film and salt. I learned this the hard way when I coated a customer's Range Rover without decontaminating first, it streaked like crazy the first time it rained. Use a dedicated glass polish or even a bit of clay bar first. If you're on a budget, a 50/50 mix of IPA (Isopropyl Alcohol) and water works wonders to get the surface naked.

Honestly, I wouldn't bother with those cheap 'all-in-one' wash soaps that claim to add rain protection. They're rubbish. For the hot Aussie summer, I reckon you should go for a dedicated sealant. For a quick fix, Rain-X is okay, but it doesn't love the 40-degree heat. If you want something that'll actually last through a dusty Nullarbor crossing, look at Gtechniq G1 or Bowden's Own Bead Machine. They handle the UV much better.

Here is a pro tip: your repellent is only as good as your wipers. After you treat the glass, wipe your rubber blades down with some glass cleaner. You'll be shocked at the black gunk that comes off. If your blades are old and crunchy from the sun, they'll chatter across a treated windscreen. Give them a rub with some 303 Aerospace Protectant to keep the rubber supple, or just chuck 'em and get new ones if they're toasted.

If you've parked under a gum tree or done a big highway stint, don't just blast the wipers. That red dust and bug guts act like sandpaper. I always carry a small spray bottle of bug remover (the Bowden's one is a ripper) and a decent microfibre in the boot. Soak the spots for a minute before you even touch the wipers. It saves your glass from those nasty micro-scratches that look terrible when the sun hits them at 5 PM.