T.F.
Whatever you do, DON'T leave it.
I have GE Profile as do many of my neighbors and we all learned the hard way with our self cleaning ovens. Out of the nearest 8 homes on my street most of us have GE Profile.
EVERY one of us who used the self clean cycle the first time had to call he fire department due to the heat. One house did catch fire. I don't know if it was the oven or the builder did not do something right but we were told then and there by the fire fighters to never use that cycle again.
We complained to GE and they did nothing. I have since ripped everything GE out of my house and replaced it with the higher end Kitchen Aid. STILL.... I will not run a clean cycle on the oven.. that was scary.
I do use the Easy off that is safe for self cleaning ovens, elbow grease and take proactive measures to ensure I don't get a mess.
And yes, the smell was awful.