Foil baked onto oven base.

kill the acid with some caustic soda - normal oven cleaner

then you can cook free of acid fumes

With the older models of self-cleaning ovens one could put aluminum foil on the bottom tray of the oven, but with the newer models there is a warning (hidden in the last line) of your booklet for models of stoves where aluminum foil should 'not' be used! Even though print in small and many consumers are complaining regarding their stoves and melted aluminum stuck to the bottom tray of their oven (nothing will get it off) all manufacturer do 'not' cover this problem under warranty and thus, it will cost you $44 to buy a new tray. You unscrew the two screws to the bottom of the damaged tray of your oven and then install the new one and put back the screws. Letters of complaint should be written to the manufacturers to have them put this warning in clear bold print right on the front cover of the instruction brochure.

Greetings,
remove as much tin foil that is possible...use something like hot water and mild detergent to loosen up the baked on cake residue...this should come up ok with alittle elbow grease...then run your self clean cycle...All will be ok....Bruce Denton

i would say you are ok,but the thing that consernes me is what was the temp that melted the foil in the first place,its takes a lot of temp to melt foil and i mean over 800 degree,was this over a long period?yes it is safe to eat the food but get that oven checked?rate this answer.adrian,,,,,,,,,,,,

See this link: http://askruth.blogspot.com/2006/07/cleaning-baked-on-foil-in-oven-help.html

"I called Sears and this is what they said to do:

BE CAREFUL, remove as much of the foil as possible Turn oven on to 200 lay an old wet bath towel on top. Use a plastic spatular to remove the foil.

They said it will take some time to remove the foil, in some cases days, and that you can still use the oven but DO NOT use the self cleaning untill all the foil is removed."

If you can remove the bottom drip tray/pan from your oven which the tinfoil is stuck to, than remove it. Ovens with "hidden element" usually have the removable bottom tray/pan. Don't scrape yet!!
Lay the tinfoil laden tray on a flat service where it wont be disturbed for a couple of days.
Now remove any tinfoil you can with a plastic scraper/spatula/pancake flipper.
Once thats done, pour bleach directly onto the drip tray/pan until it covers all the stuck tinfoil.(assuming your oven pan is like mine and has a lip all the way around and is somewhat countersunk).
Leave the bleach in for about 2 days. Now get your plastic scraper again and scrape away. The stuck tinfoil should all be dissolved by the bleach and the scraper should get rid of any residue. Then rinse!
Now this method will probably leave some darkened stains on the oven tray, but not near as ugly or noticeable as that melted tinfoil!!

Good luck!!

Don't use self clean. Get some easy off oven cleaner. Self clean gets too hot and ruins expensive delicate electronics.

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

Should never line the oven or surface pans with type of foil as it becomes brittle from the heat and can cause major electrical problems and you money. Clean the foil out of the oven and you will be good to go.

If the bottom of the oven is enamelled or has a pyrolytic self cleaning surface then you can use caustic soda to remove aluminium foil.

Many oven and hob cleaners contain caustic soda and those which do always advise that it's kept away from aluminium parts precisely because of it's effectiveness in turning aluminium into grey foamy goo!

If you're in doubt as to whether your oven floor is caustic soda resistant then try a small test patch first.

Please note that caustic soda is extremely corrosive so you'll need to keep your hands and arms covered and preferably use eye protection as well.

Hi Leia, Unfortunately, the aluminum actually melted and adhered. The only perfect fix is to buy a new bottom piece for the oven, it costs about $30.00 and it is very easy to remove the old and install the new. Just a few screws.

You can get the part directly from sears by going to sears.com

Use "The Works Toilet Bowl Cleaner" to dissolve the foil. *Caution* when the cleaner is applied to the foil a chemical reaction occurs releasing some harmful fumes so please use outside or in a well ventilated area. I just did this to a Frigidaire oven I bought from Lowes at a discounted price. The previous owners bought it, did not read the owners manual or just disregarded the warnings on using foil in the oven and thought they would line the bottom pan with foil to help make it easier to clean (Good idea, but don't try it on the hidden element ovens). With the heating element being hidden under the drip pan the heat is hot enough to melt the foil and fuse it to the pan. Now most of the pans on these ovens are removable by just a couple of screws and I strongly recommend removing the pan when doing this. Squirt some Works toilet bowl cleaner on it in a well ventilated area and watch it go to work. It took about 15 minutes for it to dissolve all the foil on my oven, then I rinsed it clean and reinstalled it in the oven. The pan does have a slight discoloration on it, not from the cleaner but from the foil being melted onto the pan, if you choose you can buff this out. Most of the modern ovens have the ceramic coated drip pans in them so the Works toilet bowl cleaner will not harm them, unless you have scratched the finish off. Works Toilet bowl cleaner contains a fair amount of hydrochloric acid which is what makes this work so well.