Harley Benton Blues Harmonica Set

I was aware that I was buying a low quality product, given the price and the quantity of harps... but when it came and I tried playing I was rather disappointed. I am not a pro, but I can do most bends properly and play nice melodies. With these I could do none. And they all tasted heavily of a petrol-derived chemical. I tried washing them, drying them and giving them another chance but I ended up giving them away (some) and the rest to the yellow container.

After a while, I noticed that some of the notes on several harmonicas are not playable. When you blow/ draw on these, you cannot get any sound. Either they were faulty when I received them or they got damaged over time, although I did not use them at all. So the latter option is rather improbable.