Mr Muscle, spray it on everything in side a huge bin bag or two (assuming you can take the glass out of the doors) and leave for at least 12 hours, or as long as you can. A nice warm day outside really works wonders for some of that that. Just make sure you keep the air out as much as possible once you've sprayed - do the spraying once your shelves/glass doors are in the bag, add one at a time, keep spraying until they're all covered (don't breathe in, and ideally do all this outside!)
I use a clip to seal the bag, but you can knot it.
Then wash off the next day with warm soapy water - you might need to scrub a bit, but not a lot.
In my house we use the 'oven cleaning weekend' (which I do once every 6 weeks now - it's honestly worth it to keep on top of it!) for a take away, so no cooking is needed, and the oven shelves/doors are cool when they go in the bin bag.
I have an oven liner at the bottom of my oven, so I just wash that with the warm soapy water too, and when everything's back in we're good to go.
Give it a try, it really works!