The sash windows are made of two panels of glass vertically accommodated. Some designs of windows with sash have a removable panel, while in others, the two can move. Traditionally, this type of windows had wooden frames, but modern use aluminum because of its durability and resistance to swelling which produces wet weather. Over time, window rails tend to collect dirt, which can cause the sticking window. A work of poor quality painting can also prevent windows from sliding if the paint dried on the bonds. Fortunately, restore the lubricity of the windows with guillotine is usually a simple job.
- Cut any remaining paint that has dried between the sashes of the window and stops it with a close paint. Be careful to demarcate the edge of the cutters for not inadvertently paint chipping stop and the guillotine. Sometimes the horizontal joint between the front and rear cutters can also be sealed with paint. Clean it with the closure if necessary.
- Place a block of wood against the window sash and hit it gently with a hammer until the window open. Use the block along the entire length of both cutters. The wooden block is necessary to avoid damaging the soft aluminum.
- Scrub the rails of the window with a soft brush, such as one for teeth, to remove dirt.
- Aspire the rails with a handheld vacuum and cleans them with a damp cloth and then allow them to dry.
- Apply a layer of lubricant oil based on the whole along the rails of the window. Do not use beeswax or paraffin because these products are designed for wood and not for aluminum.