Cockroaches... Fastest way to eradicate?

[David Bardwell]

4 unit apartment building, 100 years old, have been using professional exterminator monthly for last 3 months but not seeing improvement. I'm on the verge of losing tenants over the problem.

I know sanitation is key and I'm working to keep tenants on top of things in this regard. But I'm hoping someone can provide a suggestion that I can act on immediately.

Instead of baiting or trapping, is there a good reason my exterminator wouldn't recommend fumigation?

[Account Closed]

@David Bardwell roaches are a filth problem. Get rid of the filth (including the people who allow it), then get rid of the roaches. In that order. It’ll never work otherwise.