I've found the easiest and best way to clean the HotEnd is with a Leather Gardening glove that has rough leather fingers
when the HotEnd is up to temperature.
It cleans it up a treat. Just don't keep your finger still for to long.

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Please send me a PM if you have suggestions, or problems with Big Blue 360.
I won't see comments in threads, as I move around to much.
Working Link to Big Blue 360 Complete