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all these thingies to clean the chain are useless, they just push dirt inside the links imo. Unless you have a chain without master link, in that case maybe better use one of those thingies that close around the chain and you pour soapy water or whatever inside, they are even approved by the god of this oldass nerd board.
by my experience you shouldn't let the chain get so greasy you need to deep clean it often, and i wouldn't suggest using a degreaser for a regular clean. a gentle rub with a clean cloth and a light oiling is what I do regularly.