CTP Multi-Surface products by Munro-Co brands.  CTP Multi-Surface is a brand of specialty stone care products, and is generally recommended for cleaning and maintaining quartz countertops.  The CTP Multi-Surface product line consists of the CTP Multi-Surface Granite & Quartz Treatment, Streak-Free Cleaner, and Calcium, Lime, Rust, and Soap Scum Remover.  Together, these products are versatile to clean everything from quartz and grout to phone screens and eyeglasses.