I assume that this is not a general problem, but signs of a faulty production series.
I did this so notified and offered to send one of the returned products not directly to him, following the assumption that we would be interested in a possible presence of manufacturing problem the manufacturer Walimex.
In response, I got the tip, I could see on the bill, who is the seller of the goods and send back to this. Who "ultimately for the cost aufkäme", but one virtue not to tell me.
Bomb Tip, hmmm, let me think, oh, at Amazon, I ordered the goods. I had also written in my mail. No Amazon partner as Walser or so.
No matter, in any case there seems to be little interest, to go to the bottom of things. I'll send the useless items in any case back now and will have to look for another manufacturer.
For now, I would advise against the purchase of this product. Due to the processing I would anyway come from a too high price, because wertig does not affect at least the plastic magnifier in plastic case.