Don't use a blowdryer. It produces heat, not just airflow, and that isn't really something you want. If anything, just use a vacuum cleaner to suck up as much dust as you can.
As for the transplant, there's really nothing to it. What I recommend is just that you disconnect all the cables beforehand, and then just do it step by step. It's not very complicated, nor is it difficult. Just take your time, don't be careless, and everything will go fine.
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