I am the same with cockroaches, when I walk into the flat and I tell my boyfriend
"I CAN SMELL THEM"
and he's like "haha no way, we don't have a problem, I don't see any"
- then when I manage to find their nest at our place where they are trying to relocate (from next door) in this random-ass spot, he's like
"oh wow, how did you even find that"
"I sniffed them out"
"Ah, alright, I'll give you this one"
and then just repeat this process on a monthly basis
"I CAN SMELL THEM"
and he's like "haha no way, we don't have a problem, I don't see any"
- then when I manage to find their nest at our place where they are trying to relocate (from next door) in this random-ass spot, he's like
"oh wow, how did you even find that"
"I sniffed them out"
"Ah, alright, I'll give you this one"
and then just repeat this process on a monthly basis