I clean the frig on Monday's and my upright I just did a super clean- (rotten food got accidently unplugged for 2 weeks) 

• Dumped all items
• Moved out of shed so I could wash & spray
  
• Washed well with soapy water and rags to remove yuck
• Bleached with spray bottle twice let sit 24 hours
  
• Plugged back
  
• Place 4 trays of baking soda in the freezer for 24 hours
  
• Dumped trays
• Replace again with 2 baking soda and 2 coffee
• Freezed for 24 hours dumped
  
• Stocked with food
• Changed the baking soda and coffee again

I don't really have a system. But, when I am cleaning my kitchen every evening, I sometimes look around for something I can swipe at with the paper towel before I toss it. The dust on the canisters or the back of the stove, behind the faucet, the window sill, and sometimes I swipe one of the shelves in the fridge, alternating of course.

So no real system other than just looking around and seeing what else I can swipe at before I toss the paper towel. Please, nobody tell me how much more economical it is to clean with cloths or microfiber cloths. I clean the rest of my house with those but the kitchen I use paper towels I can toss. Primarily because I don't want bits of food encrusted cloths lounging around in the laundry hamper in a house with cats :)

I don't do spring cleaning. Every week I have one day I look around and just do what looks like it needs done whether it is dusting, etc.

We wipe out any and all spills and usually a total cleaning on Saturday evening ...   really we do when it needs it

the freezer is usualy when we are getting ready for a major refill .