From fingerprints to streaks, it seems like your glasses collect all of the smudges. Even if you don’t wear glasses, you know how annoying it is to look down at your phone and see an abundance of spots and smears. If you’re ready to take a stand against blurry screens and lenses, we’ve got good news.

Today, you can grab a box of 200, individually-wrapped, pre-moistened wipes from Wowflash for less than $9. (Pro tip: you can also snag the 400 and even 600 packs on sale, if you’re trying to be the king of lens wipes.)

Users call them “quick and convenient” and “a small must-have for anyone who wears glasses or uses devices with lenses!” And because of their compact size and versatility, once you buy a box, reviewers say you’ll start carrying them everywhere you go.

“I keep some in my desk drawer, some in my nightstand and a handful in my purse!” one review wrote. “For performance I give them five stars and portability I give them 27 stars.”

Infused with a gentle but powerful cleaning formula, these wipes remove dirt, dust and smudges from glasses, sunglasses, goggles and binocular lenses and all sorts of screen-based tech. “The cleaning performance is excellent, leaving my lenses streak-free and clear every time,” one review said. “I also appreciate that they are safe for my lenses and don’t cause any scratches.”