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" My nonstick pan has accumulated a black substance on the bottom, inside. I was told there is something in cooking spray that does this. -- PH Yup, it&amp;#039;s usually a buildup of no-stick spray. Many sprays have lecithin in them, and when you spray them on a hot pan, it &amp;quot;sticks&amp;quot; like glue. Here is the hint to getting those nonstick pans clean. Fill a pan with water (about 1 inch from the top) and add 1 tablespoon of powdered dishwasher detergent. Bring to a boil, then simmer for 10 minutes. CAUTION: Do not let this boil dry, and turn the exhaust fan on to remove any fumes. Let the mixture cool, then clean with a nonabrasive scrubby or brush. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.goodhousekeeping.com/home/cleaning/tips/a2008/nonstick-pan-cleaning-oct01/>