Does it work? Yes. Is it working fine? It depends on the user's skills. If you're new, YouTube is your friend. Serious. It's a simple concept: the solder you want to remove will be absorbed into the braid when the braid is heated (capillary action?). Easier said than done. Some factors to consider: how old is the solder, is it lead-free or lead-free? Again, check YouTube how it works before committing.
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