Google cleaning a microwave, many suggestions there. I tried googling cleaning a speed oven and didn't get many "Hits"
See the URL (Cleaning a microwave) below to see one of them I found, but there are many others too.
I have that same oven, 3 years now, and alto doesnt look brand new, is still pretty shiny inside---I may try one of the suggestions I found while Googling.
Good Luck!

GAry

Here is a link that might be useful: Cleaning a microwave

Here's another one I found but------I would get some of the other folks inputs here, before you tried this, My lungs aren't the greatest, so I think I would pass on this one.

Gary

Thanks, Dodge! No link for second one, though.
Lisa

Here's the link for cleaning a speed oven with Amonia. I actually found it while seaching for cleaning Speed oven.
The post if from "Fix Ya". The URL is below.

Here is a link that might be useful: Amonia Link

You're the best. Gonna do it tonight. Thank you!
Lisa

Let me know how it works, alto mine not bad, it would not pass the "White Glove Test"
Thanks!!

Gary