Originally Posted by
CB HI
^^^^ The brush with a little non-toxic citrus based cleaner (like Pedro's Orange Peelz, or the Park version) works well. Spin the crank and hold the brush against the chainring with the cleaner, then use a rag to periodically clean the brush as it will get dirty quickly if the chainring is real dirty. Either remove the chain, or shift the chain away from the chainring you wish to clean. Repeat using the brush and cleaning the brush with the rag until the chainring is reasonably clean. The only way to get it completely clean is to remove the crank, but the brush and cleaner way works well enough. Of course, lube the chain and chainrings when cleaning is completed.