Cleaning fry pans

[Prof]

Can anyone recommend a cleaner that will clean the bottoms of fry pans?

I have several pans that have what looks like burnt on blackened oil on their bases..

The pans are still good but heat transfer is not as good as when they were new..

[Jason]

Do you know what type of base the fry pans have @Prof? For example, cast iron, stainless steel or non-stick Teflon? 

Jason

[Prof]

I think the worst three have a thick cast metal base of some sort, with Teflon cook surface..

[AndreaNg]

How old are they @Prof?

I find even expensive brands don't last more than a couple of years before the coating isn't non-stick anymore. And that's with being very careful with washing and using soft utensils. 

[Prof]

The oldest pan would be 2 years old..The non stick surface is fine..It's just the bases of the pans that I want to clean..

[AndreaNg]

Ah, sorry I misunderstood. Have you tried baking soda, vinegar and steel wool like this - https://www.youtube.com/watch?v=NXkWgI9Fm9Q

[Prof]

No I haven't tried that..btw the bottom of my pans are about 10 times worse than the one in the video.!!
On Monday I tried oven cleaner..I sprayed a pan and left it over night..I then scrubbed the base with steel wool and most of it came off.!
I think a second application will get the rest off..