The hardware on our impact resistant windows and doors must be cleaned, cleared of debris and lubricated semi-annually. Aluminum, glass and weather-stripping must be washed with a mild soap solution and a soft rag every 3 months (no abrasive cleaners). Glass surfaces can be cleaned with a commercial glass cleaner and paper towels. Products installed on waterfront properties may require more frequent maintenance based on actual site conditions such as blowing sand or salt water spray. Please refer to our warranty for more details.