Cleaning monthly contact lenses takes about 30 seconds per lens and should happen every time you remove them. The key is a simple rub-and-rinse technique with the right solution, done consistently every night. Skipping even one cleaning lets protein, oils, and bacteria accumulate on the lens surface, which gets harder to remove the longer it sits.
The Rub-and-Rinse Method
Start by washing your hands with a non-oily soap. Bar soaps like Dial or clear antibacterial pump soaps work well. Avoid creamy soaps like Dove or Caress, which leave a film on your fingers that transfers directly onto the lens.
Place the lens in the palm of your hand and add two to three drops of your cleaning solution. Gently rub the lens with your index finger for 10 to 15 seconds. This physically loosens protein deposits, lipids, and microscopic debris that soaking alone won’t remove. Even if your solution is labeled “no rub,” rubbing for at least 10 seconds makes a real difference in how clean the lens actually gets.
After rubbing, rinse the lens thoroughly with fresh solution, then place it in your case filled with clean solution. Let the lenses soak overnight, or for the minimum time your solution specifies. In the morning, dump the old solution out of the case before putting your lenses in. Never top off yesterday’s solution with fresh solution.
Multipurpose vs. Hydrogen Peroxide Solutions
Multipurpose solutions handle cleaning, rinsing, and disinfecting in one step. They’re affordable, fast, and the most popular choice for daily cleaning. You can rub, rinse, and store your lenses in the same liquid.
Hydrogen peroxide solutions are preservative-free, which makes them a good option if your eyes are sensitive or allergic to the chemicals in multipurpose formulas. They’re also stronger disinfectants. The tradeoff is that they require more time and attention. You place your lenses in a special case filled with the solution and soak them for six to eight hours. During that time, a neutralizer (either built into the case or added as a separate tablet) converts the hydrogen peroxide into plain saline.
This neutralization step is critical. Hydrogen peroxide that hasn’t been fully neutralized will sting and burn if it touches your eye, and it can cause real damage. If you use a two-step system where you manually add a neutralizing tablet, forgetting that step is a genuine risk. One-step systems with a built-in neutralizer in the case are safer for most people.
Never Use Water on Your Lenses
Tap water, bottled water, distilled water, and homemade saline solutions are all unsafe for contact lenses. Tap water contains a microbe called Acanthamoeba that’s extremely common in water supplies. According to the U.S. Environmental Protection Agency, this organism has a dormant form that can survive for long periods and an active form that causes serious eye infections. Both forms stick to the surface of contact lenses and lens cases.
Acanthamoeba keratitis, the infection it causes, is painful and difficult to treat. The simplest way to avoid it is to keep your lenses and case away from any water that isn’t sterile contact lens solution. That includes not showering or swimming while wearing your lenses.
How to Clean Your Lens Case
Your lens case needs its own cleaning routine every day. After you put your lenses in each morning, dump out all the old solution. Rinse the case with fresh multipurpose solution (not water), then place it face down on a clean paper towel and let it air dry completely. Drying face down lets excess liquid drain out while keeping airborne particles from settling inside the wells.
Replace the entire case every three months. Over time, the plastic develops microscopic cracks that harbor bacteria and form biofilms that cleaning solution can’t penetrate. If you swim regularly, live in a humid climate, or store your case in the bathroom, replace it every one to two months. People with diabetes, dry eye, or compromised immune systems should also replace their case monthly.
Dealing With Protein and Lipid Buildup
Your tears naturally contain proteins and oils that deposit onto the lens surface every time you blink. Daily rubbing removes most of this buildup, but over a month of wear, some residue accumulates. You might notice your lenses feel slightly less comfortable in the last week of their cycle, or your vision seems a touch cloudier than when they were new. That’s normal deposit buildup.
Some people produce heavier deposits than others, particularly those with allergies or certain eye conditions. If your lenses consistently feel filmy or uncomfortable before the month is up, your eye care provider may recommend a weekly enzymatic cleaner that breaks down protein deposits more aggressively than daily solution alone. Switching to a hydrogen peroxide system can also help, since it tends to be more thorough at removing tear film components.
Makeup and Contact Lenses
Always insert your lenses before applying any makeup near your eyes. Clean, dry hands go in first, lenses second, makeup third. At the end of the day, reverse the order: remove your lenses first, then take off your makeup. This prevents cosmetic particles, oils, and removers from getting trapped between the lens and your eye or coating the lens surface.
How Long Your Solution Lasts
An opened bottle of contact lens solution is good for about 90 days, regardless of how much is left. After that, the preservatives and disinfecting agents break down and the solution may no longer kill bacteria effectively. Check the bottle for an expiration date as well. Unopened bottles that have passed their printed expiration should be discarded. Keep the cap tightly closed between uses, and never let the bottle tip touch your fingers, lenses, or any surface.