How do I clean built up grease spots off of my kitchen appliances?

Okay, so my hubby is a sloppy cook, but, hey he cooks great!! Now we are selling our home. In doing a thorough cleaning, my stove top and under my microwave is just layered with oil and grease spots!!! I have tried everything to clean it off, but it only smears it!!! The one thing that remotely works a bit is... show more Okay, so my hubby is a sloppy cook, but, hey he cooks great!! Now we are selling our home. In doing a thorough cleaning, my stove top and under my microwave is just layered with oil and grease spots!!! I have tried everything to clean it off, but it only smears it!!! The one thing that remotely works a bit is taking a butter knife and gently scraping it off. But, even then that doesn't take it all off!!!

Please Help a horrible house wife, :).
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