Reviving this thread

Over the last couple of days have had half a dozen visits from these evil baskets.

Now we live on the top (4th) floor of our apartment block and a quick scan doesn't seem to show anything. Now I am allergic to the gestapo of the insect world so am not going to try to hard to discover the location of the nest but fear it must be close by.

I understand that I am responsible for paying to get rid of them, but who should I contact to do a search and the necessary killing once the nest is found? The letting agency or is there a local council department who deals with this?

Basel based.

Many (nervous) thanks in advance.

M.