Let’s be honest: most of us only clean the parts of the window we actually see. A quick spray, a couple of wipes, and boom – streak-free shine. But did you know that up to 80% of dirt and moisture buildup happens in hidden areas around windows? That grime doesn’t just look bad (when you finally notice it), it can affect your air quality, trap moisture, and even cause mould.
Clean windows don’t just brighten your space. They help reduce condensation, prevent leaks, and keep your heating and cooling bills under control, especially in regions with harsh weather. Ottawa windows experts recommend paying attention to less-obvious areas to extend the lifespan of your windows and maintain energy efficiency.
Grab your favourite cleaning gloves. Here are 7 forgotten spots that deserve extra care. Your windows and lungs will thank you.
- Window Tracks and Sills
Window tracks and sills often collect dust, dead insects, and moisture. Over time, this buildup can block drainage and make it harder to open or close the window. Excess water in the tracks may also contribute to mould growth or cause frame damage.
How to clean effectively:
- Vacuum out loose debris using a narrow attachment;
- Spray a mild cleaning solution or diluted vinegar into the tracks;
- Scrub edges and corners with a small brush or an old toothbrush;
- Wipe dry thoroughly to prevent new moisture from settling;
Regular maintenance keeps the tracks clear so windows operate properly and remain better sealed against outdoor drafts.
- Weep Holes (Drainage)
At the bottom of many window frames, you’ll find small openings known as weep holes. Their purpose is to drain water away from the frame, preventing moisture from pooling inside the structure. If these become clogged with dirt or debris, water can back up, leading to leaks, frame damage, or increased condensation.
How to maintain:
- Check for blockages during seasonal cleaning;
- Use a toothpick, soft brush, or compressed air to clear openings;
- Flush with a small amount of water to ensure proper drainage;
Keeping weep holes clear supports the longevity of your windows and helps prevent hidden moisture issues. To make this task a regular part of your home maintenance, consider tying it to seasonal activities.
For example, check the weep holes during your first lawn mowing in spring or while putting away holiday decorations. Connecting these checks to common routines makes them effortless habits.
- Weatherstripping
Weatherstripping creates a tight seal between the sash and frame, helping keep indoor temperatures stable. Dust, grime, or mildew can weaken its flexibility and shorten its lifespan.
Damaged or dirty weatherstripping can cause heat loss, drafts, and higher energy bills. Faulty weatherstripping can cause up to 10% of heat loss in a typical home, significantly impacting energy efficiency and costs.
How to maintain:
- Wipe with a damp cloth and mild detergent;
- Inspect regularly for cracks, wear, or tears;
- Replace if flattened, brittle, or no longer sealing properly;
Clean weatherstripping helps maintain energy efficiency and comfort inside the home. Quality weatherstripping typically lasts 5 to 10 years under normal use, depending on material and conditions. Regular inspections and timely replacements ensure your home maintains optimal insulation and energy savings.
- Window Screens
Window screens trap dust, pollen, and pollutants before they enter your home. If neglected, screens can reduce airflow and sunlight and contribute to indoor humidity. Fine debris buildup may also spread into window frames and tracks.
How to clean:
- Remove screens and rinse with warm, soapy water;
- Gently scrub using a soft-bristle brush;
- Allow to fully dry before reinstalling;
Regular screen cleaning improves ventilation and supports healthier indoor air.
- Window Hardware and Hinges
Handles, locks, and hinges often accumulate oils, fingerprints, and dust. When these components stick, the window may not close properly, affecting security and insulation.
Poor sealing around hardware can also reduce energy efficiency or lead to excessive water leaks, especially during rainy weather. Ensuring locks function smoothly is crucial for safety, preventing issues during emergencies when quick access or secure locking is needed.
How to maintain:
- Wipe hardware with a microfiber cloth and non-corrosive cleaner;
- Lubricate moving parts with silicone-safe lubricant when needed;
- Tighten loose screws and check for alignment issues;
Clean, well-maintained hardware ensures a proper seal and smoother operation.
- Exterior Window Frame
The exterior frame is constantly exposed to the elements, facing dust, rain, and harsh conditions, especially in the cold season. Over time, this exposure can trap moisture against the surface, weakening finishes and increasing the risk of rot or corrosion. Keeping the exterior frame clean makes it easier to spot early signs of wear before they become serious issues. Addressing these elements adds years to the life of your windows.
How to maintain:
- Wash with a mild soap and water solution;
- Avoid abrasive cleaners that can damage protective coatings;
- Rinse thoroughly and allow to dry;
A clean exterior frame offers better durability and supports long-term window performance.
- Glass Edges and Gasket Line
The perimeter where the glass meets the frame is a common point of moisture accumulation. Dust and grime here can affect the gasket’s flexibility and contribute to mould. Clean edges help protect the insulating seal inside the unit and maintain clear sightlines.
How to clean:
- Use a cotton swab or soft brush to reach tight corners;
- Apply a gentle, glass-safe cleaner;
- Dry completely to discourage moisture buildup;
Maintaining this area supports the integrity of the window seal and helps keep condensation under control.
Wrapping Up
Windows are a major part of your home’s comfort and efficiency, yet dirt, moisture, and built-up debris in hidden spots can interfere with proper drainage, weaken seals, and reduce ventilation. Over time, that can lead to issues such as mould, condensation, and reduced energy efficiency.
By paying attention to these seven areas in your regular cleaning routine, homeowners help their windows perform as they are designed to, keeping homes healthier, brighter, and better protected from the elements. A few extra minutes of care can extend the life of your windows and preserve the investment you’ve made in your home.