Dr. G mentioned using ONR at a 6oz/gal dilution ratio. I tried it today as a quick detailer and glass cleaner. Works great. Not really necessary, but it does work and boosts the cleaning power. I did a full wash yesterday using Feynlab Pure Wash, OPC for presoak. ONR is such a great product. These rinseless wash products can really remove the need for an interior and glass cleaner. Also much more ecofriendly compared to some of other products out there. One of the GOATs in the detailing world.