I don’t know, I do a lot of work with the soldering iron, probably an hour or so a week. I have bought new tips for it as they get corroded but that has nothing to do with the filling of it. I have been expecting the soldering iron to bite the dust for years as it’s old, but it keeps going. So does the $3.00 torch from Harbor Tools.

If a $3.00 torch can work for years, why can’t a $20.00 lighter???