Daily head cleanings are required on a daily basis.
One must take place, even if the printer is not used for printing on film.
The printer must be used daily even if just for a few test prints on plain copy paper.
The 1st head cleaning must take place before the 1st print of the day.
An additional one for every 90 minutes of printing if the printer has the stirring-wims then it must be connected to power at all times.
The silver button must be held down for short 1-second bursts (on/off) for about 30 seconds, prior to powering on the printer.