Use a Speciality Knife
The easiest and safest way to remove stubborn plastic from a ceramic stovetop is to use a speciality knife or razor made specifically for cooktops. The burners should be off and the oven should cool to room temperature before beginning the procedure. This generally takes 40 minutes to one hour if stove has been in use.
Hold the blade carefully and scrape at the topmost layer of melted plastic. Be careful when scraping not to use too much force, or the ceramic may begin to scratch. Work at the stubborn plastic layer by layer until all or most of the plastic has been removed.
Use Boiling Water
For harder to remove stains, or stains that remain even after using a specialty knife, use boiling water. To prepare, boil water in the microwave or on the burner furthest away from the stain. Once the water begins to boil, pour one half of water over melted plastic slowly. Be sure to keep fingers and hands away from the boiling water as you pour. As soon as water hits the stain, begin scraping at the melted plastic again with a specialty knife. If necessary, repeat until plastic is completely removed.
Ceramic Stovetop Maintenance
To ensure longevity and efficiency of your ceramic stove, be sure to use only specialty razors and knives when cleaning the stovetop. In addition, only specialty cleansing products should be used on glass and ceramic stovetops. Soft rags, particularly those made for ceramic stovetops, are also useful in preserving your stove. Always allow the stove to cool completely before cleaning, and use metal and wooden utensils when possible to avoid future stains.