Originally Posted by cthenn

I dunno, never heard that before, but it seems to not do that... I use a two step process, first wiping the chain down with a degreaser soaked rag, to get off most of the external gunk, then run the chain cleaner with undiluted Simple Green (a gallon just is less than $10 at HD). Chain comes out sparkling clean every time, and it doesn't feel like there's gunk or grit lodged inside. Also, it seems important to use the Park brand version of this. I haven't personally used the generic versions, but from things I've read, this is one time where the brand name item is superior. I will note, that I've used it probably 10 times or less, and some of the brushes are already fraying slightly. I think they sell replacement parts, but it seems to be starting to show wear already...