Electrolux EKC6049X

Electrolux Cooker EKC 6049X. My principal concern after only 2 months use, is the poor quality of the controls. Already the temperature/control settings/symbols on the controls are starting to wear away. I only clean that area with a J cloth and washing up liquid solution. Electrolux service centre are attending to replace them, but have told me that it will only be done once as the damage must be the result of the use of a non-approved cleaning material. Wrong. I am meticulous in what I use, and in my view the controls have been poorly specified. Otherwise the cooker is excellent. I do hope that Electrolux will re-visit the controls issue and offer an improved solution.