As anyone who wears glasses can tell you, it’s incredibly annoying to see the world through specs, smudges, and fingerprint-smeared lenses. Glasses are generally designed to help deflect as many blemishes as possible, but sometimes, it becomes too much, and you need to deep clean your glasses. While wiping the lenses on your shirt isn’t the worst thing, sometimes, your specs need a full-scale bath.

After washing your hands thoroughly with warm water and soap, give your glasses a warm rinse to flush the major debris, like hair or fur, from the frames. Then, use a tiny dot of non-moisturizing dish soap and lather up the lenses themselves as well as the frames to disinfect everything and wash away skin oils, makeup, and the “finer” dirt. After about 10 seconds, rinse the glasses very thoroughly, as soap residue will make the glasses foggy. Shake the glasses once or twice to get off most of the water, and gently pat them with a lint-free towel to remove the rest.

Ideally, you’ll have access to running warm water to clean your glasses, but in a pinch, you can pick up some inexpensive glasses-cleaning solution from a corner store or a pharmacy. Apply the solution liberally to ensure a thorough cleaning. If you’re using cleaning wipes, make sure that they won’t interfere with any coating you may have on your frames to deter UV or blue light. Wipes for specially coated glasses are usually well-labeled. Dry microfiber cloth is also a great on-the-go tool to keep your vision clear. Because they’re so effective at trapping dirt and oils, it’s important to wash them regularly to make sure the cloth itself is clean, too.

No amount of cleaning will fix a scratch, so take your glasses to a professional if one develops. Sometimes, glasses come with a scratch warranty to defray or cover the cost of repairing a scratch, so check with your optometrist at the time of purchase. Liquids meant to “remove” scratches usually just fill in the crevices with wax to make them less apparent. Additionally, if the nose pads of your glasses have begun to yellow, visit a professional to have them replaced with fresh ones free from oils and other particles.