What's the best cook top oven cleaner?

white vinegar and water 50/50 spray on and wipe off with a micro-fiber cloth

Do you mean oven cleaner or cook top cleaner?

I use bar keepers friend, works very well.

I use Bartenders Helper...it may be difficult to find in your area though. Best cleaning agent I've found for most surfaces.

Is it a GLASS cook top?

If you’re talking about a glass cooktop, any glass cleaner should work just fine as well as one of the softer scouring liquids (Soft Scrub etc.). For cooked on spots you can actually use #0000 steel wool! I’ve use this on my cars windshield to good effect.

www.bartendershelper.com