In the third week I then could not complete my bike because the key even after many attempts did not let introduce into the lock. With too brute force I have not attempted to cancel the key is also no solution.
On the weekend before I had the lock or greased with a special agent that rust and dirt away and also has a lubricating effect.
Perhaps such locks are not suitable for outdoor use, then I do not even need them. If I pay more than 30 euros, I expect a castle with sufficient suitability for everyday use.