When cleaning pots that you have easy access to, this is my preferred method. 2 or 3 drops of Caig F5 cleaning/lubricant, then rotate the part 10 times or so. Then add one more drop.
That should easily clean most dirty pots.
Other methods may apply for different scenarios, of course. The secret is, don't use too much!
Caig F5 Spray: [ Ссылка ]
(Affiliate link👆)

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