Take two teaspoons of sodium carbonate/washing soda and a half glass of synthetic vinegar, dissolve sodium carbonate into the synthetic vinegar, dip the kitchen sponge into the solution and tap the kitchen sponge inside your microwave oven, leave it for 10-15mins, wipe it off with a clean piece of cloth. All dirt and oil will disappear! Your microwave will be as good as new! 😀
*Note: Tip for those who don’t have a microwave CLEANER and need an instant home made solution!