Nozzle head, cleaning system, method for cleaning and glass element

A method for cleaning a glass element with a nozzle head of a cleaning system, the method comprising:

• inserting the nozzle head inside the glass element, the nozzle head comprising:
• a cleaning opening for releasing a part of the fluid and pointing in a first direction;
• and
• a pressure balancing opening for releasing a part of the fluid and pointing in a second direction, wherein two half spaces comprising a first one and a second one are separated by a plane which is perpendicular to a center axis of the nozzle head, wherein a first direction vector of the first direction points in a direction at least one of towards the first half space or away from the second half space, wherein a second direction vector of the second direction points in a direction at least one of towards the second half space or away from the first half space, wherein the pressure balancing opening is arranged to extend concentrically with regard to the center axis of the nozzle head;
• and
• releasing fluid out of the nozzle head within the glass element.