My nail polish water marble do not spread out what can be the problem even that my water are in the room temperature?

If your nail polish isn't spreading in water marbling, it could be due to the type of polish you're using—some polishes, especially those that are thicker or non-water-based, may not spread well. Additionally, the water's pH or impurities might affect the polish's ability to spread. Ensure you're using 100% pure water, and try using a different brand of polish designed for water marbling. Lastly, consider the environment; humidity and air temperature can also impact the marbling process.