We've been hosting in a tropical environment where cockroaches are part of the ecosystem for 10 years ~ 500 guest stays. Although we've worked hard to keep our unit pest free invariably this is a top nagging issue travelers report. We think it's partly because the travelers that report them 1) don't come from tropical areas and don't have experience with them. 2) don't read-understand or agree with our house manual section on roaches.
This is how our defense has evolved. If anyone has errors or omissions to point out I'm sure not only we will be grateful but many others that host in tropical environments would love for you to post your comment(s) here.
House Manual - Cockroaches:
They are part of Hawaii's warm, tropical ecosystem.
If you can’t abide them, maybe vacationing in Hawaii is not for you. People that live in warm or coastal cities are most familiar with this aspect of nature (National Geographic Video About Cockroaches) https://video.nationalgeographic.com/video/cockroach_german.
(American Housing Survey, U.S. Census Bureau, top 10 cities. Roach infestation statistics). https://hawaiihome.cc/listings/islandcolony/2206/roach.jpg
We as hosts do our part to minimize pests in the condo by 1) seal openings through the walls such as around plumbing pipes, electric wires and doors 2) thoroughly clean before each guest check in 3) monthly treatment by licensed pest control experts.
During and after check in, cockroaches can enter the unit the following ways: 1) hitchhike on your luggage – from contaminated airplane luggage holds or vehicles 2) whenever the front door or Lanai door or Lanai windows are open 3) on back packs, purses or other carried accessories they can board while you are on outings.
What attracts cockroaches 1) warmth 2) food 3) water or moisture 3) dirty laundry. How soon will cockroaches respond to an “invitation”? – Virtually immediately.
What you can do as a guest to avoid attracting cockroaches: 1) hang towels on towel bars – don’t leave moist towels or footmat on the floor. 2) always wash and dry dishes directly after meals – don’t leave drinks or dirty dishes out. 3) Keep all food in the refrigerator – don’t leave food in cabinets - even in sealed containers 4) keep your laundry clean, dry and odor free. And, of course, don't leave food crumbs on the floor or elsewhere!
Following the steps previously mentioned, we minimize exposure to pests. As you can imagine, even Halekulani – the most expensive hotel in Hawaii will have unwelcome visitors if the pest avoidance practices shown above are not observed.
PS. We have also tried
1) anti-cockroach electronic systems
2) putting boric acid in inconspicuous places (as recommended by local licensed pest control agents) - 2 lines of defense not currently mentioned in our house manual.
Aloha and Mahalo for your kind consideration