Melted Tin Foil in bottom of oven

Question

=New Kenmore - just bought at Sears end of August - I put tin foil on the botton to catch spills and the foil melted.  This is a brand new oven and doesnt have the coil so even though I have used the foil in this manner for years in my old oven, I now have a huge problem with my brand new appliance.  How can I  clean it off?

I have the same problem with a brand new wolf gas oven and it's on the porcelain bottom of the oven which cannot be removed.  Please tell me there is a way for this to be removed, I just paid $7000.00 for this oven.  The tech line at wolf/subzero were no help at all!