solved: unique ptrs were not reset and cleared properly when sf::event::closed in handleInput() 

Sure! Here’s a concise list to address memory leaks:

1. **Use a Memory Profiler**: Tools like Valgrind or built-in IDE profilers can help track memory usage.
2. **Review Code**: Check for unreleased resources, circular references, and event listeners.
3. **Static Code Analysis**: Use tools to identify potential leaks in your code.
4. **Test for Leaks**: Simulate long-running conditions to monitor memory usage.
5. **Regular Code Reviews**: Get peers to review your memory management practices.
6. **Document Ownership**: Clearly define the lifecycle of objects.
7. **Automated Checks**: Integrate memory checks in your CI/CD pipeline.

Let me know if you need more details on any point!