Moving parts should be protected from exposure to weld flash whenever possible. If allowed to accumulate across platen and fixture insulation, flash will cause a slow burning, gradually extending back to inaccessible areas. Eventually this will begin to interfere with the welding process, and a major repair and cleaning are called for. Transformers should also be protected from weld flash. Flash can get in the winding causing a short in the windings.
Electrodes require regular maintenance.
The size and shape of the electrode largely determines the quality of the weld. Therefore, it is of primary importance that the weld face remains constant. Because of this, tips should be frequently changed or dressed. Several dressing devices are available. They might be air operated cutters or manual files.