Hi. I use the oven pride oven cleaning bag/ kit. Which I think is the best thing for doing your racks and the inside of the oven but the glass bit( that you can take out) of the doors is disgusting. I have tried elbow grease and scrubbing with boiling hot water and washing up liquid. I've tried vinegar, window cleaner. Everything. An I put the glass in the oven pride bags too? Any other ideas that will get rid of the grime ?