How should one start the installation of screws to avoid specific issues?

Starting the installation of screws by hand is essential to prevent cross threading, which occurs when the screw threads do not align properly with the threads of the material being fastened. This misalignment can cause significant damage to both the screw and the material, leading to structural weakness, difficulties in tightening, and potential failure of the connection. By using manual force initially, the installer can ensure that the screw is properly oriented and gently guided into the threaded hole, thereby reducing the risk of cross threading and ensuring a secure fit.

Using power tools, while efficient, can be risky if the installer is not careful, as the speed and torque may lead to overtightening or improper alignment. Lubrication, although helpful in some contexts, is not universally necessary and can complicate the installation process if not managed properly. Pre-drilled holes are also beneficial in many installations but do not specifically address the initial engagement of the screw, which is critical in avoiding cross threading. Thus, beginning by hand is the most effective strategy to ensure a successful and safe screw installation.