This is the model that I have (image is from Amazon).
How to descale keurig with vinegar?
by Maria
+4
Can someone tell me how to descale a Keurig with vinegar? My Keurig is my best friend 
. I can't get by a day without my coffee. But it's not working as well as it used to and I think it wants to be cleaned. I try to avoid chemicals so I like to clean just about everything in my house with (white) vinegar. Does anyone know how to descale a Keurig with white vinegar? Thanks!
Very easy!
https://www.keurig.com/descale
https://www.countryliving.com/home-maintenance/cleaning/a20901319/how-to-clean-a-keurig/
We clean our coffee maker every few months with vinegar. Fill it with vinegar instead of water and run it until all the vinegar has come through. If it isn’t running faster do it again until it is. :)
Hi Maria,
There is a great post about how to do this here on Hometalk, and it says
to do the following:
1. Pour vinegar in the machine and run the brew cycle (with no k-cup) until the vinegar comes out clean. It will take a few cycles.
2. Run a few cycles of just water through the brewer to remove the vinegar.
3. Clean the inside with a sponge or cloth (with a little bit of soap).
4. Use your little cleaning brushes to get in between the little crevices.
5. Clean the outside with a sponge or cloth.
Here's the link - there's more information in the post, and some good comments from the Hometalk community. Hope this helps!
https://www.hometalk.com/diy/clean/appliances/keep-your-keurig-clean-easy-and-quick-way-how-to-clean-your-keuri-21698019
Keep Your Keurig Clean – Easy and Quick Way, How to Clean Your Keuri
Run a mix of equal parts water and white vinegar through the machine. Pour the solution into the reservoir, turn on the machine, press the cycle button, and allow the solution to drain into a cup. You may need to descale your Keurig multiple times depending on how dirty it is.
Here's a post that might help https://chascrazycreations.com/natural-cleaning-with-vinegar/