I know there is talk or saying~"Don't clean your coffee maker, it's well seasoned and keeps your coffee tasting great!" Uh....No! In my opinion, that's gross.
If you don't have an RO system (reverse osmosis) or other filter action system, your coffee brewers/makers will build up a lot of calcium and minerals that will soon ruin your coffee brewer of choice AND makes your coffee start to taste a little yucky. AND...using filtered water WILL build up deposits and minerals too.
So it's nice to clean them out often to keep your coffee makers brewing great coffee.
The one I turn to is Distilled White Vinegar. I'm sure you are familiar of the advantages of using Distilled Vingear to decalcify. When you notice your coffee maker not driping as quickly as it used to, it's time to get the vinegar out.
As you know, I have just about every style of coffee brewer from single pour to espresso machine. However, I love this electric Pour Over that Johnny purchased for me. Unfortunately they stopped making them for the US because people complained that it wouldn't fit under there kitchen cabinets. Who cares!!!! I love it because after it brews you can unplug it and carry it by the top handle to your dinning table to serve coffee. Everything stays in place...the coffee carafe never moves as you maneuver through the house. It's super cool.
Anyway, I will take about half of a small bottle of vinegar and pour up top. Whatever coffee maker you have just add to the reservoir. I usually let that sit for a few minutes just on its own. Then I will turn on the coffee maker and begin brewing through as if I'm making coffee. It's amazing how quick and easy this is. If you feel you need to run it again with vinegar, let your coffee carafe cool and just pour the vinegar back through and start the brewing process again.
Next, discard the vinegar from your carafe and wash with soapy water. If there are other removable parts, I would suggest you wash those as well. You are now wanting to remove the vinegar from your carafe and coffee parts.
Lastly, add water to your coffee reservoir and and run water through the maker a couple of times to remove any residual vinegar. When you think you've run enough water through the machine, I would take a sip of the hot water you just ran through. Make sure it doesn't taste "vinegar-y". I learned the hard way years ago when Johnny had cleaned the coffee maker and maybe ran one cycle of water through. He poured me the first cup of coffee and when. I took a large sip...it was the most vinegar tasting coffee...so horrible I ran to the sink to spit it out. Of course I asked him " How many times did you run plain water through?" His immediate answer to this type of questioning is typically "I don't know!" "Is it bad?" I told him to taste it...he wouldn't. (Wink wink smiley face)
If you are a serious coffee drinker, you should keep up on all coffee brewers in your home. Be sure to review instructions on your maker to ensure you can add vinegar to clean. I have a commercial espresso machine and I use a product called Cafiza. You can order on Amazon and a little goes a long way.
I will take a 1/4 teaspoon of Cafiza and add to my Chemex and French Press with hot water and let it sit for a couple of minutes. Everything comes out sparkling clean. This product works great on some of your coffee accessories to clean up the coffee oils and residue. Again, be sure to check with your manual on best practices of cleaning any coffee maker and especially the semi automatic and automatic espresso machines. Those will have specific instructions on how to properly clean and keep running smoothly so you'll never miss a drop of good tasting java.