On a whim I put a bit of WD 40 on a paper towel and cleaned it. That was last week and it still looks good with no ileffects. I have a 2 year old range with same wife and same purses, it looks new.
Recently hit resume and the she stated to pick up faster than I expected. Stopped it at around 85 and saw it was set for 115. I had it set for around 70 I think. Did on another day but to 105.