Hi, does anyone know how to activate and de-activate the demo mode on a Miele Condenser Tumble dryer model no T9246C. Has worked perfectly for 5 years located in old peoples complex but now it has somehow entered demo mode and i cannot clear it.i have tried various button presses with the start/stop button as for service mode but it wont do anything until demo mode is de activated. i have spoken to miele hoping they would tell me how but they will not. any help much appreciated 🙁