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Remove all residual flux with distilled water (possibly sonicate them) and ethanol. Failure to remove all flux will lead to quick corrosion of the spring and will cause them to break within weeks.
If too much solder is on the spring, it can be removed easily using a razor blade and/or fine sand paper. If possible, donDon't use desoldering braid or any method that heats up the solder as this will likely mess up the alignment or break the spring.
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