Rainx or G1 on windscreen

[Booth11]

Used clay is great for the shower glass. Even better if you use shower gel as a lube and do it when you are all ready in there carrying out ablutions. Take two bottles into the shower? No need.

    

Agree. I've been using shampoo (hair) as the clay lube - works well on hair and with clay. Not good enough for my car though. 

I always clean the shower whilst I'm actually taking a shower, if I didn't do it no-one else would!  Usually come out of the cubicle smelling of Limelite limescale cleaner.......nice. Who needs fancy shower gel, and it masks my usual odour of car wax      

[Wo-Wo]

Cant really comment showering technique as I'm a bath person but to be boring and on topic I posted a video of Gtechniq G5 on Instagram the other day.

5 weeks of wear and no wiper judder:-

https://instagram.com/p/9hNqz4k24N/

[dragonfly]

Worth a go and very good: http://www.angelwax.co.uk/?wpsc-product=h2go-rain-repellent or http://car-chem.com/store/car-care-exterior/glass/carchem-ultra-glass-sealant-v2

[Organisys]

I've used G1 on three cars now. I wouldn't be without it.
Give it a good clean with a good citrus cleaner every now and then and it springs back to life.

[Eccie]

Ive got G1 on the front and rear screen & pano roofs on both cars, G5 on the side window's - never had any judder issues, wouldn't be without it.