Here are a few safety tips to follow when cleaning windows:

1. Use a sturdy ladder that is appropriate for the height of the window. Make sure the ladder is on a flat, stable surface and use the ladder's safety locks to secure it in place.
2. Wear shoes with non-slip soles and use a harness or other safety equipment if you are working at a height that requires it.
3. Don't lean out too far when cleaning windows. Keep your body close to the ladder and use a stable foothold at all times.
4. Use a spotter if you are working at a height that makes you feel uneasy. A spotter can help hold the ladder steady and provide an extra level of safety.
5. Be aware of your surroundings and avoid cleaning windows that are near power lines or other hazards.
6. If you are using a cleaning solution, be sure to read and follow the manufacturer's instructions. Some solutions may be harmful if ingested or if they come into contact with your skin or eyes.​

By following these safety tips, you can help ensure a safe and successful window cleaning experience.