Window Maintenance Myths Homeowners Still Believe (and the Truth You Need to Know)

By: ClearMax Staff
Posted on: September 29, 2025

Windows are one of the hardest working features of our homes, yet most of us don’t give much importance to it until a draft or a leak forces us to pay attention. Windows tend to seem simple. Myths about how to care for them have circulated for decades, and some of those myths can quietly drain your wallet. As one of the largest online window and door suppliers, ClearMax® hears such myths every day and helps homeowners separate fact from fiction. Before you spend another weekend scrubbing or sealing, let us bust the biggest window maintenance myths and set the record straight.

Myth #1: Windows Don’t Need Regular Cleaning If They Look Fine

It is believed by a great proportion of people that as long as you can see through them, you can skip cleaning. But the actual truth is dirt, grime, and mineral deposits eat away at seals, glass coating, and frames – even if the window still looks okay. The tip is to clean windows at least twice a year with a gentle solution such as mild soap with water and a soft cloth. Avoid harsh chemicals because they damage Low-E coatings.

Myth #2: “Any Household Cleaner Works on Windows”

People generally believe that anything, such as an ammonia-based cleaner or a strong detergent, can work fine. Ammonia and abrasives can strip away the protective coatings. It can cloud the glass and weaken weatherstripping. You should use a non-abrasive cleaner or a vinegar-water mix with a microfiber cloth for streak-free and coating-safe results.

Myth #3: “Caulking Once Is Enough to Seal Windows Forever”

Most people believe that after installation, caulking is a one-time job. It is a completely false belief. The truth is that caulk and sealants dry out, crack, and separate over time, letting moisture and air sneak in. We should inspect caulking. Every season, reapply as soon as you notice gaps to avoid costly water damage.

Myth #4: “Condensation Means Your Windows Are Defective”

The belief is that moisture on the inside of the glass is always a sign of failure. Contrarily, the fact is that condensation can be a normal reaction to indoor humidity. Condensation inside the windows is due to a humidity issue inside the house. Condensation between the panes is due to failed seals, which means that a repair or replacement is needed. To rule out the possibility, check humidity levels and use a dehumidifier before blaming the window itself.

Myth #6: “DIY Repairs Save Money”

It is the most common perception that a little sealant or a homemade fix is equal to professional maintenance. This can even worsen the condition. Incorrect repairs can void warranties or cause hidden leaks. It can even worsen damage and thus result in costing more in the long run.A practical solution to this is that minor cleaning is fine, but for issues like broken seals, cracked glass, or frame warping, call a professional.

You should watch for warning signs while handling windows. Such as difficulty opening and closing windows, fogging, or soft wood. Keep landscaping trimmed so plants don’t trap moisture against frames. When it comes to windows, a little preventive care goes a long way- but only if it’s based on facts, not old myths. Whether you need guidance on maintenance or a full replacement, ClearMax® is here to help with expert advice and ENERGY STAR® certified products.