Weird small particles

[Cakicen]

Hello all,

I have been reading all the forum depthly since 1 month. Before writing this I thought maybe my situation is different. I have simple pot still with worm copper conderser (attached the images). I haven't done any runs and nor a sacrifice run yet. But several times I cleaned the inside of the worm with boiling water-vinegar-lemon salt(citric acid) mix than rinsed with clean water. Sometimes the particles tend to disappear but when i rinse it again with water the next day i again see these things. Do you think sacrifice run will help remove these particels or should i suspect that my copper wire is not a real copper. But the latter seems not probable since i took the wire to an air conditioner shop and let them cut it from half. I thing the people there would warn me that this is not a real copper wire.

Many thanks in advance for your helps.