Every 3 years I clean the elbow on my 2030, but it's the same for any engine.
The water channel gets clogged up with carbon and scale build up, so I take it off and block off end of elbow with a rubber glove and elastic band so I can fill it up with " Acide Chlorhydrique " cost €1.85 in France leave it 24 hrs before washing out and refitting.
It's not a difficult job and easier second time of doing. I put plumbers silicon grease on the surfaces and threads when refitting which makes the next time easy.
Tools I use are the key to making life easy, you can see the automotive hose easy out tools that make short work of breaking the exhaust pipe seal, you can use a screw driver but these tools are better. Ease the pipe around and put wd 40 in let it do the work then remove pipe.
New gasket on re assy, job done.
Hope this helps
Odysseus