Here are some troubleshooting steps to try to get your touchscreen working properly:

1. Check connections – Inspect the connections between your touchscreen and your computer and make sure everything is properly connected and secure.
2. Restart devices – Reboot your computer and touchscreen device to see if that solves the problem.
3. Verify drivers – Check whether the drivers for your touchscreen are up to date and properly installed.
4. Clean the screen – Use a clean, microfiber cloth to clean off dirt or dust that may be interfering with the touchscreen.
5. Override settings – If none of the above fixes work, try changing the touch control device settings to override the default settings.