What can be a consequence of cross-contamination during soldering?

Cross-contamination during soldering can lead to defective joints and compromised performance due to the presence of unwanted substances on the surfaces that are being joined. When contaminants such as oils, dirt, or residues from other materials are present, they can prevent the solder from wetting the surfaces properly. This lack of proper wetting can result in poor adhesion and a weak joint. Additionally, contamination can cause issues such as inclusions or uneven distribution of solder, which may further weaken the joint or lead to mechanical failure over time. Ensuring clean surfaces is critical in soldering processes to achieve reliable and durable joints.