We recommend conducting a comprehensive maintenance check on your doors and windows every 3 to 6 months by following these specific steps:

1.Core Maintenance for Universal Hardware Use a soft, dry cloth to clean dust and stains from handles, hinges, and sliding rails. Never use strong acidic or alkaline cleaners. Apply 1-2 drops of specialized door and window hardware lubricant or silicone grease to core moving parts like hinges and transmission gears, then open and close the windows several times to ensure smooth and silent operation. Also, carefully check all fixing screws and tighten them promptly if any looseness is found.

2.Differentiated Maintenance for Different Materials

Door and window frames made of different materials have distinct maintenance needs:

·Aluminum & Thermally Broken Aluminum Windows: Use neutral cleaners for daily cleaning to avoid corroding the coating on the profiles. If there are minor scratches or oxidation spots, gently wipe them with a soft cloth and a small amount of toothpaste. Be sure to wipe away any accumulated water in the tracks after rain to prevent pulleys from rusting.

·uPVC (PVC) Windows: Never use organic solvents like acetone or alcohol, or sharp tools to scrape the surface, as this can corrode or scratch the material. For daily cleaning of oil stains, use a soft cloth dipped in soapy water. Note that uPVC becomes brittle in low temperatures, so avoid using excessive force when opening or closing windows in winter.

·Wooden Windows: Wood has a natural "life" and requires special attention to moisture and sun protection. Avoid excessive wetness during cleaning, and always dry immediately with a dry cloth after wiping. It is recommended to apply wood wax oil or varnish 1-2 times a year to enhance water resistance and prevent cracking, warping, or rotting caused by dryness or humidity.

3.Four Common Mistakes in Daily Window Cleaning

Many seemingly "efficient" cleaning habits are actually quietly damaging your windows:

·Mistake 1: Using steel wool or old newspapers. Abrasive materials like steel wool will severely scratch glass and profiles; old newspapers can leave ink stains. It is recommended to use microfiber cloths and rubber squeegees.

·Mistake 2: Cleaning under direct sunlight. High temperatures cause cleaners and water to evaporate quickly, leaving stubborn water spots and streaks on the glass. The best time to clean is in the early morning, evening, or on cloudy days.

·Mistake 3: Wet wiping without dusting first. Dust on the window surface turns into mud when wet and may contain sand particles that scratch the glass. Before cleaning, be sure to thoroughly remove dust, cobwebs, and other debris with a soft brush or vacuum cleaner.

·Mistake 4: Abusing strong acidic/alkaline or ammonia-based cleaners. These powerful cleaners can corrode the sealing strips and profile coatings, leading to seal failure and material aging. Stick to plain water or neutral cleaners for daily cleaning.

Daily care and scientific avoidance of these pitfalls will keep your windows in top condition for years to come, providing the most solid guarantee for your family's safety and quality of life.