Is it just me or is it really difficult to hear the "i" at the end of some of the plural words?
It's not just you. It's supposed to be barely audible. I would almost say that you're better off not pronouncing it at all rather than actually just saying a normal "i". Technically speaking, it's a sign of palatalization, which basically means you move your tongue "up" a bit at the end.
Honestly if I am in a situation in which I have to say this phrase, I'll join in on the mosquito eating journey.