Monthly contact lenses are designed to last 30 calendar days from the moment you open the package, not 30 days of actual wear. That distinction matters because the lens material degrades over time whether it’s on your eye or sitting in solution. Getting the most comfort and safety out of each pair comes down to a consistent routine: clean hands, proper insertion, daily cleaning, and replacing lenses and cases on schedule.
Start With Clean, Dry Hands
Wash your hands thoroughly with soap and water before touching your lenses, every single time. Avoid soaps with added moisturizers, oils, or fragrances, as these leave a film on your fingers that transfers directly onto the lens surface and blurs your vision. Dry your hands with a lint-free towel or a fresh paper towel. Cloth towels shed tiny fibers that cling to wet lenses and irritate the eye.
Check the Lens Before You Put It In
Place the lens on the tip of your index or middle finger and hold it up at eye level. You’re looking for two things: damage and orientation. Inspect the lens for any tears, nicks, or dried spots. Then check whether it’s right-side out. A correctly oriented lens looks like a smooth bowl with edges that curve gently upward. If the edges flare outward like a saucer or a lid, the lens is inside out and needs to be flipped.
Some lenses have tiny laser-etched markings, often the numbers “123” or a letter sequence. If those characters read normally, the lens is oriented correctly. If they appear reversed or backwards, flip the lens. Other brands use a colored handling tint along the edge. When the lens is right-side out, the tint looks bright and distinct. If it appears faded or washed out, the lens is inside out. Wearing an inverted lens won’t damage your eye, but it will feel uncomfortable and slide around.
How to Insert Your Lenses
With the lens balanced on your fingertip, use your other hand to hold your upper eyelid open. Pull your lower eyelid down with the middle or ring finger of the hand holding the lens. You can look straight ahead into a mirror, or look up toward the ceiling while placing the lens on the white part of your eye. Both approaches work, so use whichever feels more natural.
Once the lens is on your eye, close your eyes slowly. Roll your eyes in a full circle to help the lens settle into position, and gently massage through the closed lid if needed. Open your eyes and blink softly a few times. Check in the mirror that the lens is centered over your iris. If it’s shifted off to one side, close your eye and gently press through the lid to nudge it into place.
If you’re new to contacts, the instinct to blink or flinch is strong. An alternative grip that helps: use the thumb and fingers of your non-dominant hand to hold both eyelids wide open at once, freeing your dominant hand to focus only on lens placement.
The Daily Cleaning Routine
Every time you remove your lenses, clean them before storing. This step is non-negotiable, even if the solution bottle says “no rub.” The rub-and-rinse method physically removes protein deposits, bacteria, and debris that soaking alone can’t fully dissolve.
Place the lens in your palm, apply a few drops of fresh solution, and gently rub the lens back and forth with your fingertip for about 20 seconds on each side. Then rinse the lens with more solution and place it in a clean case filled with fresh solution. Never top off old solution. Dump it out, fill the case with new solution each night, and let the lenses soak for the minimum time listed on your solution’s packaging (typically at least four to six hours).
Choosing the Right Solution
Most monthly lens wearers use a multipurpose solution, which cleans, rinses, disinfects, and stores lenses in a single product. It’s convenient and straightforward. The other option is a hydrogen peroxide-based system, which uses a special case with a built-in neutralizing disc. You fill the case, drop in your lenses, and leave them for a minimum of six hours while the peroxide converts to saline. Peroxide systems are preservative-free, which makes them a good choice if your eyes are sensitive to the chemicals in multipurpose solutions.
The critical rule with peroxide systems: never put the solution directly in your eye. It must fully neutralize in the case first. Using the wrong case or skipping the wait time causes intense stinging and redness.
Keep Water Away From Your Lenses
Tap water, shower water, pool water, and lake water all pose a real infection risk. A microorganism called Acanthamoeba is common in tap water and exists in two forms, one of which can survive for long periods by forming a protective shell. These organisms stick to contact lens surfaces and can infect the cornea, causing a condition that lasts weeks to months and never fully heals even with treatment. Symptoms include severe eye pain, the sensation of something stuck in the eye, and a whitish ring at the edge of the cornea.
The EPA specifically warns against rinsing or storing lenses in tap water, swimming while wearing contacts, or using homemade saline solutions. If your lenses get splashed in the shower, remove them, clean them thoroughly with sterile solution, and let them soak before wearing again. If you swim regularly, prescription goggles are a safer bet than wearing lenses in the water.
Take Care of the Case Too
Your lens case is a breeding ground for bacteria if neglected. After inserting your lenses each morning, dump out the old solution, rinse the case with fresh contact lens solution (not water), and leave it open to air dry face-down on a clean surface. Keeping the caps off while it dries prevents moisture from sitting in the wells, which is where bacterial biofilms develop.
Replace the entire case every three months. Most solution bottles come with a new case attached, making this easy to remember. A grimy, scratched, or discolored case should be replaced immediately regardless of how old it is.
Stick to the 30-Day Schedule
Monthly lenses are built from silicone hydrogel materials that allow significantly more oxygen to reach your cornea than older lens types, roughly 5 to 10 times more than traditional hydrogels. But even these advanced materials accumulate protein deposits and microbial buildup over time that no amount of cleaning can fully reverse. After 30 days, the lens surface becomes progressively less breathable and more likely to harbor bacteria.
Wearing monthlies beyond their replacement date increases your risk of discomfort, dryness, and infection. Mark the date you open a new pair on your phone or calendar. If a lens tears or becomes uncomfortable before the 30 days are up, replace it early. One damaged lens doesn’t mean you need to replace both, just swap out the one that’s compromised and note that the two lenses will now be on slightly different schedules.
Wearing Schedule and Rest Days
Most monthly lenses are approved for daily wear only, meaning you put them in each morning and remove them each night. Some silicone hydrogel monthlies are approved for extended (overnight) wear, but sleeping in any contact lens raises infection risk substantially. Your cornea gets less oxygen while your eyes are closed, and a lens on top of that compounds the problem. Even if your lenses are approved for overnight use, giving your eyes a break overnight is the safer habit.
Aim to remove your lenses after 10 to 14 hours of wear per day. If your eyes feel dry or tired before that, take the lenses out early. Having a backup pair of glasses for evenings and rest days gives your corneas regular recovery time and extends your comfort throughout each 30-day cycle.
Warning Signs to Watch For
Remove your lenses immediately if you notice eye pain, redness, blurred vision, light sensitivity, excessive tearing, or unusual discharge. These are the hallmark symptoms of bacterial keratitis, a corneal infection that requires prompt treatment to prevent lasting damage. Don’t wait to see if symptoms improve on their own, and don’t put the same lenses back in. Contact your eye care provider the same day if possible.