Occasionally, you can soak the burner racks in warm, soapy water. Just spray with a gentle cleanser and wipe dry. You could also follow the manufacturer's directions. Spray a kitchen cleanser on the oven door and wipe clean. You could use a window cleaner on the window if you so choose.
Many oven cleaners work overnight.
You might have to use some elbow grease, but it's still easier than 50 years ago. Be sure the oven is completely rinsed clean of oven cleaner residue. You would not want any of the cleaner to be in the oven when you cook. Depending on how often there are spills in the oven, you should plan on cleaning your oven on a monthly basis. Microwave ovens are simple to clean.