1 Answer

Whirlpool offers these suggestions for their glass top ranges. Maytag glass tops or smooth tops would probably follow with the same suggestions.  I could not find anything from Maytag about this. 

Whirlpool recommends stainless steel bottom pots for use on the glass cooktop stoves. Whirlpool does not recommend aluminum or cast iron, which will scratch the glass top. You may use copper-bottom pots if you make sure they are clean on the bottom. Check the bottom of a pot before you set it on the cooktop to prevent scratches and gray marks. Look for baked-on food or heavy stains. Avoid scratches on the glass top by not scooting pots from one burner to another. Even wet pots may stain the cooktop and make more work for you. If grease or food spatters when you cook, Whirlpool recommends that you clean the entire cooktop to prevent baked-on stains. A deep stainless steel pot will avoid gray marks and most spatters.

Read more: http://www.ehow.com/info_7935126_gray-marks-whirlpool-glasstop-stove.html#ixzz2xQxZ9Woj