We also suggest that the tuning come after the heat has been turned on for the winter, after the air conditioning has been turned on for the summer, or after any long distant move. Years ago our homes were not as insulated as they are today. It is still not good to be placed in a window. The God made materials in the piano expand and contract with the changes in temperature and humidity. When you minimize these factors, you prolong the life of the piano and help maintain the tuning.
Most manufacturers recommend only a damp cloth to clean the keys and cabinet.
For polyester finishes we have a spray cleaner that can be used. Never apply furniture polish to a polyester finish piano. Most furniture damage can be repaired at the next destination, such as a broken leg or broken music rack. If the piano is dropped, you may have more serious damage to the back posts, plate, sound board and bridges. Consult with a qualified piano tuner or technician before accepting any insurance settlement for damages.