So far I worked from an old big pile of soldering wire, that my father purchased long ago. It had a classic rosin smell when melted, that I could always smell when working with soldering wires. But I run out of the pile, and first I tried to buy something on Aliexpress. When it arrived and I tried it, I was satisfied to see that it melted more easily than my old pile, but it emitted very very bad smell. It had a smell like gummed paper tape, that is used by artists to fasten paper onto boards. Then, I tried to buy something at the local electronics shop, where the quality is not outstanding but usually OK. Tried the wire purchased there: the same bad smell. Now I wonder where I could buy the wire that has a similar rosin smell like my old pile. Any idea from Aliexpress? If not, from a store in the US or Germany?