If you’re having trouble reading this article because of smudges on your screen or glasses lenses — you’re in exactly the right place. Whether you wear glasses every day, are finally breaking out the sunglasses or need something to wipe down your phone, computer or camera, reviewers say this 4-piece lens cleaning set from Koala is the one to buy, especially because it’s under $10.

“After a single spray and wipe, my lenses were so clean it felt like they weren’t even there,” one reviewer said. “Seriously — it gave me that ‘first time wearing new glasses’ feeling.”

The set includes two 2-ounce spray bottles of alcohol- and fragrance-free cleaning solution, and two Japanese microfiber cloths designed to clean your lenses quickly and effortlessly. “No continual rubbing,” another said. “Cleans the lenses quickly and leaves them totally clear.”

The “gentle, yet extremely effective” spray is celebrated for ridding lenses of all sorts of smudges, fingerprints, and as reviewer Michael Ramos describes that “occasional mystery gunk.”

Users, like Ramos, who have glasses lenses with special coatings especially like that the spray is alcohol-free, as Ramos has found that “alcohol-based sprays can damage the coatings over time.” Others note they enjoy the size of the spray bottles, calling it “large enough to last a long time but still easy to keep handy.”