Ever wonder where those swirls and scratches in your paint came from? It's your microfiber towel! Microfiber is like a magnet for dirt, and if it hits the ground, it picks up small rocks and sand — which turns it into sandpaper.

Car experts have this rule: if the microfiber hits the ground, don’t use it on paint again. Washing it just isn’t good enough.

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“Proper Care & Feeding of Cars” is a techsplainer series hosted by automotive journalist Jason Cammisa. Using equal measures of science, humor, and just plain common sense, it aims to help enthusiasts become the best car experts they can be. Covering everything from carcare to advanced driving techniques, new episodes of PC&F will debut regularly on ISSIMI’s YouTube and Instagram channels, as well as the @JasonCammisa Insta.