Dirty tenants scare off good tenants - help!

[Michael D.]

I really need some advice here.

I've got a 9-unit building with a small roach problem.

Now one of my clean tenants says he wants to move because the roaches are so bad - mostly caused by the gross tenants that live above and below him.

I've already sprayed recently, and I'm sending the pest guy out again soon.

What else can I do?

Michael