A mixture of baking soda and vinegar is one of the most effective cleaning products in the kitchen to remove stubborn stains.
Another method to clean your oven is to use a mixture of vinegar and water. Make sure you clean the racks well.
Slice up some lemons and boil the lemon water in the microwave. The steam will loosen the grime and will help you clean.
Another product you can use to clean your oven is some white salt. Say goodbye to spills as scrubbing salt with lemon can help clear the food spills.
Pick an old toothbrush and use it to clean all the nooks and corners that your cleaning brush has not been able to reach.