1. A method for automatically cleaning contacts of a load tap changer, the method comprising: noting a first tap position in which first tap contacts are engaged by movable contacts; noting a duration of inactivity during which the first tap position has been held; comparing the duration that the tap position has been held to a threshold value; and moving from the first tap position to a second tap position by moving the movable contacts to engage second tap contacts that are distinct from the first tap contacts if the first tap position has been held for longer than the threshold value to thereby wipe the contacts.