What are the common issues associated with sash window springs and how can they be repaired or replaced effectively?

Common issues associated with sash window springs include wear and tear, rust, and breakage. To repair or replace them effectively, you can start by removing the sash window from the frame, inspecting the springs for damage, and then either lubricating or replacing them as needed. It is important to ensure that the replacement springs are the correct size and type for your specific window model.