Hi, I've been using the same soldering iron for many years, make/model no
> marking long ago worn off, with a supply of tips that until recently I
> thought would serve for the term of my natural life. However, over the
> last few months I've found that tips stop working well a lot more rapidly,
> they look nice and shiny but have weak heat transfer and won't tin. The
> most recent instance came up with problems after less than a weeks
> service, in time gone by a tip would last for a year or more.
>
> I wondered whether my resin cored solder might be the cause of the
> problem, the roll I have is also years old.Can't see anything else that
> would cause a problem. Any thoughts?
I should add, it's not a temperature problem, the tip temperature is still fine.