Cleaning The Back of The Refrigerator?

I do not have this TF article you refer to, but I'm 88 years old and I clean the condenser coils on the back of both my refrigerators every 6-8 months.
One is an older model and the other is a double door, but both units have wheels and can usually be pulled away from the wall quite easily.

I have learned several things over the years that may help you keep safe and avoid a messy cleanup.
Always start your project by having all of your tools in one place, ready to be used. Also, have several large rags or old towels handy, just in case they're needed.

Safety: always unplug the appliance before doing anything else. Some plugs will be behind the refrigerator, so you'll have to pull this away from the wall to get to the plug.

However, you can remove the bottom panel to clean under the refrigerator without unplugging the unit. This space needs vacuuming/cleaning (as well as the removable front cover). This job can be difficult if you have difficulty getting down on your knees, so some people might need help with this task.

Remember to check your refrigerator to make sure there are no open containers or anything that might fall over and make a mess when the unit is moved.

Check some of the YouTube videos that show how to pull the unit away from the wall. Do this moving very slowly and if your unit has an ice dispenser, be sure to not pull your unit out too far and accidentally pull the water hose loose.

I have some links listed that demonstrate how to clean the back condenser coils.
www.youtube.com/watch?v=h0ytzetkjGQ
www.homeserve.com/.../
fredsappliance.com/.../