Diamond Glass Prep – Prepare to Succeed; Prep Solution for Ideal Glass Bonding; Easy Spray-on, Wipe-Off; Streak-Free, Visual Clarity; Nanodiamond Cleaning Power (500 milliliters)

I started using this as my go to window cleaning spray. Leaves no streaks and fully cleans the window, ready for a ceramic coat.

I am kind of split on reviewing this product: on one hand, this works real good, both in cleaning and making the water bead on the glass surface, and lasted for more than three weeks now. On the other hand, the formula touts nano-particles which don’t have a great reputation when it comes to environmental concerns. Still, the description states “minimal environmental impact” without further elaboration. I can trust the inorganic polymer to be degradable, but I would appreciate a word or two on the nano-particle component in the formula. I will still grade this at five stars for effectiveness and staying power.

I live closer than I'd like to a highway, and I've noticed that road grime (tire dust, diesel particulate, etc.) builds a thick film on my windshield as well as on my apartment windows. While I have used other glass cleaners--like Windex--I've found they don't do a great job of powering through the grease and grime, often requiring extreme, laborious agitation with a drill brush or similar. This glass cleaner--more aggressive than what I've used before--does a great job of powering through crud and grime - even the sticky rubber tire dust that forms a film on my windshield. It seems to work best if you spray it on the surface, allow it to sit for up to 30 seconds, and then wipe. in a crisscross grid pattern. While it works great with a towel, if you have a small random orbital to help with the though spots, this product will go a lot farther - but that should only be necessary for extreme build-up/staining. I will be coating my glass soon, and I have full confidence that this product will help effectively strip contaminants from my windshield before I apply the coating.