First, you need to clarify specifics in your question, lest I have to assume what you're talking about and give you multiple answers.
If you mean, "How do I bang Crack?"
Crush it, put it in a spoon, add water, draw into the syringe through cloth/fiber (never cotton), and inject it.
If you mean, "How do I safely bang Crack by getting rid of the cut?"
You can't! You don't know what it was cut with, so you don't know how to remove it. The nature of crack is that it's been stomped on so many times you don't know what's in it anymore. The only surefire way to bang crack without cut is to get some coke and bang it.
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