Ultimate pro tip: just use citric acid. At least in my country it's possible to buy it powdered for cheap in the grocery store, it cleans the kettle much better then vinegar and doesn't smell like shit. I have to rinse out the kettle a few times after using vinegar as I can still smell it aftwrwards there, but with citric acid I just wash it out once and bam, it's gone.

Edit: citric acid tea would probably still taste shitty though, but I cant say, unfortunately I only had the vinegar coffee once (motherfucking coffee can you imagine how bad that was 🤮)