After a short time (2-3 months), the thread, which sucks the water from the lower part of the plant is rotten. In the construction markets, we have found no substitute and normal woolen threads are not working satisfactorily. Notice: the Fadenset will cost 2.99 + 5.00 postage! A request via e-mail is not answered.
Addendum: Have now but an answer and receive a free replacement each wick. He is, however, so thick that you can not properly Thread / pinch him on the holder. Nevertheless, it seems to be working so far. I can not say anything about the durability of the new wicks.