SparkFun Forums

[Colaris]

I have had one of these for a couple of years and the other for alot longer. I would say they have had alot of use but after leaving them to heat up for about 10 minutes I find the solder is not adhereing to the joint. It behaves like toffee and is quite sticky, not fluid. Are my irons not heating up enough?

[skimask]

Tips aren't clean, solder isn't clean/right type.
Post a picture of the tips.

[seoanalyst]

Post a picture or make a question clear to solve your issue.

[darrellg]

In addition to the potential problems listed by skimask, are you sure that the solder you are using has a flux core? If not, you'll need to add flux.