@dicey @bot @Piss_Ant

Right so step one is to move the bed away from the wall and the window. It doesn't have be to be far a couple inches should be enough. Actually this should be standard practice for everyone that doesn't want a random animal crawling into their bed.

Anyway then you need to observe if they move up the bed legs onto your bed (depends on the material and the ant, right). If so next step is to coat the legs in something that will either prevent them from climbing or repel them entirely. Probably the latter.

Also why don't you have an AC unit installed jesus why do Euros hate air conditioning so much.