Put some solder on the iron first and use the solder blob to heat the wire (better heat transfer ... faster results). When the solder begins to flow on the wire add more solder until the wire is completely coated. You'll know when the wire's hot enough because surface tension will draw the solder onto the wire.
To clean I would just wipe with electrical cleaner, or rarely just resolder with some fresh solder. I wouldn't cut the ends off .... but then I'm a cheapskate.
To clean I would just wipe with electrical cleaner, or rarely just resolder with some fresh solder. I wouldn't cut the ends off .... but then I'm a cheapskate.