Pins were almost dried up, therefore, Billigprodukt

For a new whiteboard I needed a complete set.
Positive here is the magnetic holder of the sets that thus can be directly attached to the whiteboard.
But after a very long lead time, I realized that three of the pins were already so dried out that I had to throw away after the first use. The other pins are also tends to dry for new pins. That can not have been.
I very much hope that this was an isolated incident, because the set is otherwise very practical.

Addendum after one month: the holder for the pins and the cleaning liquid is over ... The rear part of the magnet is connected only with double-sided tape with the superior plastic. The connection may be loose, no longer sticks.
Unfortunately, by and by an immature cheap product.