First time replacing a GE JB710B0F1BB Stove heating element. You can search the following keywords "appliance repair supply store" in google maps to find a local store that sells replacement part. Or you can also buy online. Technician Parts has a decent selection. The following link goes to Technician Parts heating element section: http://www.technicianparts.com/?keyword=GE+WB30T10045
This video shows the best way to clean a glass cooktop. This should be the only way that you clean it. This method will help protect it from getting burnt rings around the burners and just plain looking dirty after years of use. The cooktop cleaner provides a protective coating on the cooktop to make it clean easier in the future.
This video provides step-by-step repair instructions for replacing the main cooktop on a Kenmore electric range. The most common reason for replacing the cooktop is when it is broken. Tools used: multi-screwdriver, flat head bit, Phillips head bit