The presence of mold in areas like tile grout, shower caulking, washing machine and fridge gaskets — and even on surfaces you can smell but can’t see — is pretty concerning. Even after you remove it, it can be an even bigger challenge to prevent it from coming back.

The highly concentrated formula does the dirty work for you, saving you from scrubbing and scraping.

Unlike liquid sprays, which can drip and disperse, Active’s viscous gel clings directly to the area it’s applied to, ensuring the mold-fighting ingredients stay in place. It can even stick to vertical surfaces, making cleaning easier than ever. The gel is made with a chlorine-based bleach, lye, and special compounds that let the cleaner really penetrate the mold and mess, to better clean it. While there are no extra added fragrances, reviewers say it has a bleach-like smell, and the brand recommends wearing cleaning gloves while you apply it.

After shaking the bottle for ten seconds, the brand says to apply the gel directly to the stain, wait 3-5 hours (though some leave it overnight) and then use a damp cloth to wipe away the mess. According to its many supporters, the cleaner tackles stains and black mold on tile grout, caulking and even areas like gasket seals in their washing machines — no scrubbing needed.