Philips Series 9000
Question about Philips Series 9000
How often do you clean the device with the "Cleaner" and how long do you use such a cartridge?
To be honest, I'm standing in the reeds myself: I used to do the cleaning almost daily, in the operating instructions I think I read something about 1x/week. But no matter how I do it, the device has never (!) indicated a necessary cartridge change. I now change the cartridges about every 3 months. But I don't know what is really true or "sensible".