Never heard of such a thing!
We’ll level with you. Never in our life have we heard of slug infestations. Aren’t slugs too slow to infest anything? You could just flick them away, and it would take another two weeks for the same slugs to come back. Of course, that’s assuming that you’re not squeamish with touching the mucousy creatures.
The OP complained to their landlord that the property was infested with these slow-moving slimy bugs. The landlord simply said that he’d never heard of such a thing and ignored the problem entirely. You’d think something you’ve never heard of would intrigue you, but it had the complete opposite effect on this heartless property owner.